List of Egyptian inventions and discoveries

Narmer Palette depicting king Narmer defeating the king of the north and in front of him the nomarchs with holding the standard of each nome.

• Taxation – Taxation in Egypt started during the reign of king Iry-Hor and perhaps as early as Scorpion I.[9]
• Peace treaty – The Earliest recorded peace treaty in the history of the world that survived to modern days was signed between the pharaoh Ramesses II and the Hittite king Muwatalli II after the Battle of Kadesh (1274B.C.).[10]
• Women's rights – In ancient Egypt, women enjoyed the same rights under the law as a man, however rightful entitlements depended upon social class. Landed property descended in the female line from mother to daughter, and women were entitled to administer their own property. Women in ancient Egypt could buy, sell, be a partner in legal contracts, be executor in wills and witness to legal documents, bring court action, and adopt children.[11]

Tablet of one of the earliest recorded treaties in history, Treaty of Kadesh, at the Istanbul Archaeology Museum

• Law – Ancient Egyptian law, dating as far back as 3000 BC, was based on the concept of Ma'at and characterised by tradition, rhetorical speech, social equality and impartiality.[12][13][14]
• Flag or Emblem – As early as the Predynastic times, each nome had its own standard.[15]
• Strike action – The first historically certain account of strike action was towards the end of the 20th Dynasty, under Pharaoh Ramses III in ancient Egypt on 14 November in 1152 BC. The artisans of the Royal Necropolis at Deir el-Medina walked off their jobs because they had not been paid.[16][17]
• Civil war – The first recorded civil war in the history of the world occurred at the end of the First dynasty when its last king, Qa'a died and a dynastic war began between his successors: Sneferka, Horus Bird and Hotepsekhemwy.[18][19][20]
• Religious war and Rebellion – Khasekhemwy managed to reunite Upper and Lower Egypt after a civil war between the followers of the gods Horus and Set.[21]
• Community banking models – Community banking is a non-traditional form of money-lending.[22] Unlike banks or other classic lending institutions, the funds that community banks lend to borrowers are gathered by the local community itself. This tends to mean that the individuals in a neighborhood or group have more control over who is receiving the capital and how that capital is being spent. This practice has existed in some form for centuries; in ancient Egypt, for example, when grain was often used as currency, local granaries would store and distribute the community's food supply.[23] Since that time, a variety of community banking models have evolved.
• Police – In ancient Egypt evidence of law enforcement exists as far back as the Old Kingdom period. There are records of an office known as "Judge Commandant of the Police" dating to the Fourth Dynasty.[24] During the Fifth Dynasty at the end of the Old Kingdom period, officers armed with wooden sticks were tasked with guarding public places such as markets, temples, and parks, and apprehending criminals. They are known to have made use of trained monkeys, baboons, and dogs in guard duties and catching criminals. After the Old Kingdom collapsed, ushering in the First Intermediate Period, it is thought that the same model applied. During this period, Bedouins were hired to guard the borders and protect trade caravans. During the Middle Kingdom period, a professional police force was created with a specific focus on enforcing the law, as opposed to the previous informal arrangement of using warriors as police. The police force was further reformed during the New Kingdom period.[25]
• Mail and Postal Systems – The practice of communication by written documents carried by an intermediary from one person or place to another almost certainly dates back nearly to the invention of writing. However, the development of formal postal systems occurred much later. The first documented use of an organized courier service for the dissemination of written documents is in Egypt, where Pharaohs used couriers for the dissemination of their decrees in the territory of the State (2400 BCE). The earliest surviving piece of mail is also Egyptian, dating to 255 BCE.[26]

• Standing Army – Continuous warfare led to the establishment of a Standing Army dating back to at least the Middle Kingdom.[27]
• Military organization - As early as the Old Kingdom (c.2686–2160 BC) Egypt used specific military units, with military hierarchy appearing in the Middle Kingdom (c.2055–1650 BC).[28]
• Military scribe and battle recordeing – The first well documented battle in the history of the world is the Battle of Megiddo.[29]
• Body count – The first battle with recorded body count is the Battle of Megiddo.[29]

Reconstruction of Buhen fortress

• Fortification – The world's first known fort is the fort of Tell El Sakan dating to the late predynastic period.[30]
• Catapult – A Catapult dating to the 19th century b.c. was found on the walls of the fortress of Buhen.[31]
• Draw bridge – The fortress of Buhen contains the oldest known drawbridges.[31]
• Battlements – Another feature of the Buhen fortress the construction of the world's oldest battlements.[31]
• Arrowslit – Loop holes are found for the first time in some Middle kingdom forts.[32]
• Escalade – Escalades appeared as early as the Middle Kingdom.[33]
• Battering rams – The earliest depiction of a possible battering ram is from the tomb of the 11th Dynasty noble Khety, where a pair of soldiers advance towards a fortress under the protection of a mobile roofed structure, carrying a long pole that may represent a simple battering ram.[34]
• Siege towers – Moving siege towers were invented in Egypt during the First Intermediate Period.[35]
• Naval ram – Naval rams were built on ships since at least the reign of Amenhotep I.[36]
• Dagger – In ancient Egypt, daggers were usually made of copper or bronze, while royalty had gold weapons. At least since pre-dynastic Egypt,[37] (c. 3100 BC) daggers were adorned as ceremonial objects with golden hilts and later even more ornate and varied construction. One early silver dagger was recovered with midrib design.
• Maces – Maces appeared in Egypt around 3600 B.C.[38]
• Police Dogs and War Dogs were used by the Egyptians as early as 4000 B.C.[39]
• Encryption – One of the earliest forms of encryption is symbol replacement, which was first found in the tomb of Khnumhotep II, who lived in 1900 B.C. Egypt. Symbol replacement encryption is “non-standard,” which means that the symbols require a cipher or key to understand.[40]

• Irrigation system – From at least Pre-dynastic times, kings of the Dynasty 0 made the world's first organized irrigation system.[41][42]

The ceremonial mace-head of Scorpion II depicting him with a plough in a scene of digging canals.

• Dam – King Narmer (3150 B.C.) built the walls of Memphis to function as a dam and protect the city from floods.[43]
• Diversion dam – The first Diversion dam is Sadd el-Kafara Dam built in Egypt around 2700 B.C.[44]
• Noria – Norias appeared in Egypt in the 4th Century B.C.[45]
• Beekeeping - Beekeeping was first recorded in ancient Egypt since pre-historic ages.[46]
• The first use of smoke while extracting the honey from bee nests is recorded in Ancient Egypt during the Old Kingdom.[47]
• Pet – The Ancient Egyptians were the first to keep animals in their homes as pets, believing they had magical properties.[48]
• Zoo – The world's first zoo was discovered at Hierakonpolis dating back to 3,500 B.C.[49]
• Olive cultivation – Some scholars have argued that olive cultivation originated with the Ancient Egyptians.[50][51]
• Ox drawn plough – Ox drawn ploughs were used by Ancient Egyptians as early as 2000 B.C.[52]

• Hulls – Hulls were first built in Egypt as early as 300BC.[53]

Egyptian sailing ship, ca. 1422–1411 BCE

• Sail – Sail was invented in Egypt around 6,000BC.[54]
• Masts and Bipod mast – The bipod mast is a two-legged mast used originally in Egypt during the 3rd millennium BCE. It can be described as two poles secured together at the top, forming a thin isosceles triangle. It did not appear until the Old Kingdom, third dynasty, and disappeared after the sixth dynasty when the pole mast took over during the Middle Kingdom.[55]
• Rowing or Steering oar – A predecessor to the rudder. Rowing oars set aside for steering appeared on large Egyptian vessels long before the time of Menes (3100 BC).[56] In the Old Kingdom (2686 BC-2134 BC) as many as five steering oars are found on each side of passenger boats.[56]
• Tiller – The tiller, at first a small pin run through the stock of the steering oar, can be traced to the fifth dynasty (2504–2347 BC).[57] Both the tiller and the introduction of an upright steering post abaft reduced the usual number of necessary steering oars to one each side.[58]
• The world's earliest paved roads were discovered near Faiyum dating back to the 26th century BC.[59]
• Rail – Evidence from The Lake Meoris Quarry Road (26th century BC.) suggests the presence of early wooden rail using wooden logs to.[60][61]

• Emerald – Emerald was first mined in Egypt since at least the New Kingdom.[62]
• Iron – beads made from meteorite iron was discovered in Egypt dating to 3,500 BC. (22 centuries before the Iron Age).[63] Scarce Iron tools would be found in Egypt and throughout the third millennium BC.[64]
• Mercury – The earliest known use of Mercury dates to Ancient Egypt around 1500 BC.[65]
• Natron – Natron was used by the Ancient Egyptians in Mummification.[66][67]
• Turquoise – Turquoise was mined in Egypt Since at least the First Dynasty (3000 BCE), and possibly before then, turquoise was used by the Egyptians and was mined by them in the Sinai Peninsula. This region was known as the Country of Turquoise by the native Monitu.[68] Serabit el-Khadim and Wadi Maghareh, believed to be among the oldest of known mines.
• Wattle and daub – Wattle and daub was used in Egypt as early as the Merimde culture.[69]
• Lime mortar – The Ancient Egyptians were the first to use lime mortars. Which they used to plaster the pyramids at Giza. In addition, the Egyptians also incorporated various limes into their religious temples as well as their homes. Indian traditional structures built with lime mortar, which are more than 4,000 years old like Mohenjo-daro is still a heritage monument of Indus valley civilization in Pakistan.[70] It is one of the oldest known types of mortar also used in ancient Rome and Greece, when it largely replaced the clay and gypsum mortars common to ancient Egyptian construction.[71]
• Amethyst a form of quartz was first used by the Ancient Egyptians.[72]
• Malachite – Ancient Egyptians mined malachite at Maadi as early as the Old Kingdom.[73]
• Electrum – Electrum was used as early as the third millennium BC in Old Kingdom of Egypt, sometimes as an exterior coating to the pyramidions atop ancient Egyptian pyramids and obelisks. It was also used in the making of ancient drinking vessels. Electrum is mentioned in an account of an expedition sent by Pharaoh Sahure of the Fifth Dynasty of Egypt.[74][75]
• Other than that, the ancient Egyptians were the first to use gold (4000 BC.)[76] and lead (3800 BC.)[77] abundantly.

• Intracranial pulsations[78]
• Meninges[78]
• Cerebrospinal fluid[78]
• Paralysis[79]
• Urinary incontinence – The management of urinary incontinence with pads is mentioned in the earliest medical book known, the Ebers Papyrus (1500 BC).[80]
• Anatomy – In 1600 BCE, the Edwin Smith Papyrus, an Ancient Egyptian medical text, described the heart, its vessels, liver, spleen, kidneys, hypothalamus, uterus and bladder, and showed the blood vessels diverging from the heart. The Ebers Papyrus (c. 1550 BCE) features a "treatise on the heart", with vessels carrying all the body's fluids to or from every member of the body.[81]
• Circulatory system – The earliest known writings on the circulatory system are found in the Ebers Papyrus (16th century BCE), an ancient Egyptian medical papyrus containing over 700 prescriptions and remedies, both physical and spiritual. In the papyrus, it acknowledges the connection of the heart to the arteries. The Egyptians thought air came in through the mouth and into the lungs and heart. From the heart, the air travelled to every member through the arteries. Although this concept of the circulatory system is only partially correct, it represents one of the earliest accounts of scientific thought.[82]
• Cataract – Cataract was known in Ancient Egypt from at least the Fifth Dynasty.[83]
• Cancer – The earliest written record regarding cancer is from circa 1600 BC in the Egyptian Edwin Smith Papyrus and describes breast cancer.[84]
• Diabetes – Diabetes was one of the first diseases described,[85] with an Egyptian manuscript from c. 1500 BCE mentioning "too great emptying of the urine." The Ebers papyrus includes a recommendation for a drink to take in such cases.[86] The first described cases are believed to have been type 1 diabetes.[87]
• Dracunculiasis or Guinea-worm disease and its treatment – The Ebers Papyrus says that the cure to the Guinea-Worm disease is to wrap the emerging end of the worm around a stick and slowly pull it out. 3,500 years later, this remains the standard treatment.[88]
• Hysteria – The oldest record of hysteria dates back to 1900 B.C. when Egyptians recorded behavioral abnormalities in adult women on medical papyrus.[89] The Egyptians attributed the behavioral disturbances to a wandering uterus—thus later dubbing the condition hysteria.[89] To treat hysteria Egyptian doctors prescribed various medications.[89] For example, doctors put strong smelling substances on the patients’ vulvas to encourage the uterus to return to its proper position.[89] Another tactic was to smell or swallow unsavory herbs to encourage the uterus to flee back to the lower part of the female's stomach.[89]
• Hematuria – One of the main symptoms of Bilharzia was known and treated by the ancient Egyptians.[90]
• Baldness – The Ebers papyrus contain several remedies to cure hair loss.[91]
• Colorectal surgery – The Chester Beatty Medical Papyrus, is one of the extant medical papyri, from ancient Egypt. It is dedicated to magical incantations against headaches and remedies for anorectal ailments,[92] and is dated around 1200 BC.

Prosthetic toe from ancient Egypt

• Poultice[93]
• Splint[93]

Inscription detailing ancient Egyptian medical instruments, including bone saws, suction cups, knives and scalpels, retractors, scales, lances, chisels and dental tools.

• Bandage – The Ancient Egyptians were the first to use adhesive bandages and were also the first to treat wounds with Honey.[93][94]
• Prosthesis – Prosthetics appeared circa 3,000 BC. with the earliest evidence of prosthetics appearing in ancient Egypt and Iran. The earliest recorded mention of eye prosthetics is from the Egyptian story of the Eye of Horus dates circa 3000 BC, which involves the left eye of Horus being plucked out and then restored by Thoth. The Egyptians were also early pioneers of foot prosthetics, as shown by the wooden toe found on a body from the New Kingdom circa 1000 BC.[95]
• Cauterization – Cauterization has been used to stop heavy bleeding since antiquity. The process was described in the Edwin Smith Papyrus.
• Surgical instruments – The oldest metal (Bronze[96] or copper[97][98]) surgical tools[99] in the world were discovered in the tomb of Qar.
• Scalpel[100]
• Bone cutter[100]
• Suction cups[100]
• Retractor[100]
• Syringe[100]
• Forceps[100]
• Sponge Phials[100]
• Clamps – Used to stop blood flow.[100]
• Toothpaste and Toothbrush – Since 5000 BC, the Egyptians made a tooth powder, which consisted of powdered ashes of ox hooves, myrrh, powdered and burnt eggshells, and pumice.[101]
• Breath mint[102]

• Gynaecology – The Kahun Gynaecological Papyrus, dated to about 1800 BC, deals with women's health gynaecological diseases, fertility, pregnancy, contraception, etc. Treatments are non surgical, comprising applying medicines to the affected body part or swallowing them. The womb is at times seen as the source of complaints manifesting themselves in other body parts.[103]
• Pregnancy test – The ancient Egyptians watered bags of wheat and barley with the urine of a possibly pregnant woman. Germination indicated pregnancy. The type of grain that sprouted was taken as an indicator of the fetus's sex.[104]
• Birth control – The Egyptian Ebers Papyrus from 1550 BC and the Kahun Papyrus from 1850 BC have within them some of the earliest documented descriptions of birth control: the use of honey, acacia leaves and lint to be placed in the vagina to block sperm.[105][106]
• Rhinoplasty – Treatments for the plastic repair of a broken nose are first mentioned in the Edwin Smith Papyrus,[107] a transcription of text dated to the Old Kingdom from 3000 to 2500 BCE.[108]
• Surgical suture – The earliest reports of surgical suture date to 3000 BC in ancient Egypt, and the oldest known suture is in a mummy from 1100 BC.[109]
• Ophthalmology – In the Ebers Papyrus from ancient Egypt dating to 1550 BC, a section is devoted to eye diseases.[110]

• Numeral system – Written evidence of the use of mathematics dates back to at least 3200 BC with the ivory labels found in Tomb U-j at Abydos. These labels appear to have been used as tags for grave goods and some are inscribed with numbers.[111] Further evidence of the use of the base 10 number system can be found on the Narmer Macehead which depicts offerings of 400,000 oxen, 1,422,000 goats and 120,000 prisoners.[112]
• Base-10 numeral system

Arithmetic values thought to have been represented by parts of the Eye of Horus

• Binary – The method used for ancient Egyptian multiplication is also closely related to binary numbers. In this method, multiplying one number by a second is performed by a sequence of steps in which a value (initially the first of the two numbers) is either doubled or has the first number added back into it; the order in which these steps are to be performed is given by the binary representation of the second number. This method can be seen in use, for instance, in the Rhind Mathematical Papyrus, which dates to around 1650 BC.[113][114]
• Fraction and Arithmetics with fractions – The earliest fractions were reciprocals of integers: ancient symbols representing one part of two, one part of three, one part of four, and so on.[115] The Egyptians used Egyptian fractions c. 1000 BC. About 4000 years ago, Egyptians divided with fractions using slightly different methods. They used least common multiples with unit fractions. Their methods gave the same answer as modern methods.[116]
• Dyadic rational – The Egyptians also had a different notation for dyadic fractions in the Akhmim Wooden Tablet and several Rhind Mathematical Papyrus problems.[117]
• X (Unknown)
• Quadratic equation – The ancient Egyptians were the first civilization to develop and solve second-degree (quadratic) equations. This information is found in the Berlin Papyrus fragment. Additionally, the Egyptians solve first-degree algebraic equations found in Rhind Mathematical Papyrus.[118]
• Exponentiation (Power of two) – The ancient Egyptians had laid out tables of a great number of powers of two, rather than recalculating them each time. The decomposition of a number thus consists of finding the powers of two which make it up. The Egyptians knew empirically that a given power of two would only appear once in a number.[119]
• Regula falsi – The simple false position technique is found in papyri from ancient Egyptian mathematics.[120]
• Square root – The Rhind Mathematical Papyrus is a copy from 1650 BC of an earlier Berlin Papyrus and other texts – possibly the Kahun Papyrus – that shows how the Egyptians extracted square roots by an inverse proportion method.[121]
• 0 – By 1770 BC, the Egyptians had a symbol for zero in accounting texts. The symbol nfr, meaning beautiful, was also used to indicate the base level in drawings of tombs and pyramids and distances were measured relative to the base line as being above or below this line.[122]
• Mathematical symbols – The Egyptian hieroglyphic sign for addition resembled a pair of legs walking in the direction in which the text was written (Egyptian could be written either from right to left or left to right), with the reverse sign indicating subtraction:[123]

or

• Pi – Based on the measurements of the Great Pyramid of Giza (c. 2560 BC) ,[lower-alpha 1] some Egyptologists have claimed that the ancient Egyptians used an approximation of π as 22/7 from as early as the Old Kingdom.[124][125] The Rhind Papyrus, dated around 1650 BC but copied from a document dated to 1850 BC, has a formula for the area of a circle that treats π as (16/9)² ≈ 3.16.
• The Golden number[126]
• Arithmetic progression – Rhind Mathematical Papyrus problem number 40.[127]
• Pefsu problem (modern day: Arithmetic mean)[128]
• Conversion of units – Rhind Mathematical Papyrus problem number 42.[127]
• Seked (Modern day Slope) – The seked is proportional to the reciprocal of our modern measure of slope or gradient, and to the cotangent of the angle of elevation.[129][130]
• Trigonometry and Trigonometric functions – Rhind Mathematical Papyrus problem number 56. The Egyptians, used a primitive form of trigonometry for building pyramids in the 2nd millennium BC.[131]
• Red auxiliary number – Red auxiliary numbers were written in red ink in the Rhind Mathematical Papyrus, apparently used as aids for arithmetic computations involving fractions.[132][133]

• Area of Triangle – Rhind Mathematical Papyrus problem number 51.[127]
• Area of Circle - Calculated during the calculation of the volume of the cylinder
• Area of Trapezoid – Rhind Mathematical Papyrus problem number 52.[127]
• Surface area of Sphere – The Tenth problem of the Moscow Mathematical Papyrus asks for a calculation of the surface area of a hemisphere (Struve, Gillings) or possibly the area of a semi-cylinder (Peet). Below we assume that the problem refers to the area of a hemisphere.[134]
• Volume of Cylinder – Rhind Mathematical Papyrus problem number 41.[127]
• Volume of Prism – Rhind Mathematical Papyrus problem number 46.[127]
• Volume of Pyramid[135]
• Volume of Frustum – The 14th problem of the Moscow Mathematical Papyrus calculates the volume of a frustum. Problem 14 states that a pyramid has been truncated in such a way that the top area is a square of length 2 units, the bottom a square of length 4 units, and the height 6 units, as shown. The volume is found to be 56 cubic units, which is correct.[136]

• System of measurement and Metrology – Ancient Egypt was one of the first civilization to have system of measurement.[137] The Ancient Egyptian measuring system contained measuring units for:
• Length – Egyptian units of length are attested from the Early Dynastic Period. Although it dates to the 5th dynasty, the Palermo stone recorded the level of the Nile River during the reign of the Early Dynastic pharaoh Djer, when the height of the Nile was recorded as 6 cubits and 1 palm (about 3.217 m or 10 ft 6.7 in). A 3rd Dynasty diagram shows how to construct an elliptical vault using simple measures along an arc. The ostracon depicting this diagram was found near the Step Pyramid of Saqqara. A curve is divided into five sections and the height of the curve is given in cubits, palms, and digits in each of the sections.[138]

Cubit rod from the Turin Museum.

• Area – Records of land area also date to the Early Dynastic Period. The Palermo stone records grants of land expressed in terms of kha and setat. Mathematical papyri also include units of land area in their problems. For example, several problems in the Moscow Mathematical Papyrus give the area of rectangular plots of land in terms of setat and the ratio of the sides and then require the scribe to solve for their exact lengths.[139]
• Volume[139]
• Weight – Weighs were known since the Old Kingdom and perhaps as early as the Early Dynastic Period. Weights were measured in terms of deben. This unit would have been equivalent to 13.6 grams in the Old Kingdom and Middle Kingdom. During the New Kingdom however it was equivalent to 91 grams. For smaller amounts the qedet (​¹⁄₁₀ of a deben) and the shematy (​¹⁄₁₂ of a deben) were used.[140]

• Geology – The earliest detailed map known in the world from the Turin Papyrus dating to Ramesside Period about 1160 BCE, shows the route to the gold mines in the Wadi Hammamat, Eastern Desert.[141]
• Topography – Besides being a Geological map of surprisingly modern aspect, the Turin Papyrus is also a topographic map (the earliest known) because it accurately shows the local distribution of different rock types (with black and pink hills), the lithologically diverse wadi gravels (with brown, green and white dots), and it contains information on quarrying and mining. The draughtsman clearly and carefully distributed distinctive features in accordance with the reality of a particular area, adding clarity by the use of legends and contrasting colors. In this respect, the Turin Papyrus may be regarded as the earliest known Geographic Information System.[142][143]

World's oldest sundial, from Egypt's Valley of the Kings (c. 1500 BC)

• Mural instrument
• Decan – Decans are 36 groups of stars (small constellations) used in the Ancient Egyptian astronomy. They rose consecutively on the horizon throughout each earth rotation. The rising of each decan marked the beginning of a new decanal "hour" (Greek hōra) of the night for the ancient Egyptians, and they were used as a sidereal star clock beginning by at least the 9th or 10th Dynasty (c. 2100 BCE).[144]
• The discovery of Algol – An Ancient Egyptian Calendar of Lucky and Unlucky Days composed some 3,200 years ago is claimed to be the oldest historical document of the discovery of Algol.[145][146][147]
• Sothic cycle
• Calendar[148]
• Star clock[149]
• Solstice and Equinox[150]
• Sundials – The earliest sundials known from the archaeological record are shadow clocks (1500 BC or BCE) from ancient Egyptian astronomy.[151]

• Core drill – The earliest core drills were those used by the ancient Egyptians, invented in 3000 BC.[152]
• Dock – The earliest known docks were those discovered in Wadi al-Jarf, an ancient Egyptian harbor, of Pharaoh Khufu, dating from c.2500 BC located on the Red Sea coast.[153][154] Archaeologists also discovered anchors and storage jars near the site.[155]
• Herodotus Machine – The Herodotus Machine was a machine described by Herodotus, a Greek historian. Herodotus claims this invention enabled the ancient Egyptians to construct the pyramids. The contraption supposedly allowed workers to lift heavy building materials. Herodotus is believed to have encountered the device while traveling through Egypt. With limited reference and no true schematics, this machine has stimulated many historians' theories of how the Ancient Egyptians were able to create pyramids.[156]
• Lever – Levers (as machines used in lifting heavy weights) were invented in Ancient Egypt. In ancient Egypt technology, workmen used the lever to move and uplift obelisks weighing more than 100 tons. This is evident from the recesses in the large blocks and the handling bosses which could not be used for any purpose other than for levers.[157]
• Loom – Looms were used in ancient Egypt as early as 4400 BC, a foot pedal was used for the earliest horizontal frame loom.[158]

Papyrus (P. BM EA 10591 recto column IX, beginning of lines 13–17)

• Papyrus Paper – Papyrus paper was first manufactured in Egypt as far back as the fourth millennium BCE.[159][160][161] The earliest archaeological evidence of papyrus was excavated in 2012 and 2013 at Wadi al-Jarf, an ancient Egyptian harbor located on the Red Sea coast. These documents, the Diary of Merer, date from c. 2560–2550 BCE (end of the reign of Khufu).[160] The papyrus rolls describe the last years of building the Great Pyramid of Giza.[162]
• Ink – Ink was used in Ancient Egypt for writing and drawing on papyrus from at least the 26th century BC.[160]
• Pulley – The earliest evidence of pulleys date back to Ancient Egypt in the Twelfth Dynasty (1991–1802 BCE)[163]

One of four official letters to vizier Khay copied onto a limestone ostracon, in Egyptian Hieratic

• Rope stretcher – a rope stretcher (or harpedonaptai) was a surveyor who measured real property demarcations and foundations using knotted cords, stretched so the rope did not sag. The practice is depicted in tomb paintings of the Theban Necropolis.[164] rope-stretching itself, are attested over 3000 years from the early dynastic period to the Ptolemaic kingdom.[165]
• Plumb bob – The Plumb bob has been used since at least the time of ancient Egypt[166]
• Ostracon – The Saqqara ostracon is an ostracon, an Egyptian antiquity, tracing to the period of Djoser (2650 BC),[167]
• Siphon – Ancient Egyptian reliefs from 1500 BC depict siphons used to extract liquids from large storage jars.[168][169]
• The oldest known sundial is from Egypt; it dates back to around 1500 BC (19th Dynasty), and was discovered in the Valley of the Kings in 2013.[170] Sundials have their origin in shadow clocks, which were the first devices used for measuring the parts of a day.[171] Ancient Egyptian obelisks, constructed about 3500 BC, are also among the earliest shadow clocks.[172][173]
• Water clock – The oldest water clock of which there is physical evidence dates to c. 1417–1379 BC, during the reign of Amenhotep III where it was used in the Temple of Amen-Re at Karnak.[174] The oldest documentation of the water clock is the tomb inscription of the 16th century BC Egyptian court official Amenemhet, which identifies him as its inventor.[175][176]
• Wig – In Egyptian society men and women commonly had clean shaven or close cropped hair and often wore wigs.[177][178] The ancient Egyptians created the wig to shield shaved, hairless heads from the sun. They also wore the wigs on top of their hair using beeswax and resin to keep the wigs in place. Wealthy Egyptians would wear elaborate wigs and scented cones of animal fat on top of their wigs.[177]
• Ramps and Inclined planes – The Egyptian pyramids were constructed using inclined planes,[179][180][181]

False door of Nykara, c. 2408 BC, painted limestone, 168 x 111.5 × 6 cm, Cleveland Museum of Art

• Parchment – Writing on prepared animal skins had a long history, however. David Diringer noted that "the first mention of Egyptian documents written on leather goes back to the Fourth Dynasty (c. 2550–2450 BC), but the earliest of such documents extant are: a fragmentary roll of leather of the Sixth Dynasty (c. 24th century BC), unrolled by Dr. H. Ibscher, and preserved in the Cairo Museum; a roll of the Twelfth Dynasty (c. 1990–1777 BC) now in Berlin; the mathematical text now in the British Museum (MS. 10250); and a document of the reign of Ramses II (early thirteenth century BC)."[182]
• Doors and Door Locks[183] – The earliest in records are those represented in the paintings of some ancient Egyptian tombs, in which they are shown as single or double doors, each in a single piece of wood. Doors were once believed to be the literal doorway to the afterlife, and some doors leading to important places included designs of the afterlife.
• Combs[184]
• Bellows – Bellows were used as early as the New Kingdom.[185]
• Air conditioning – The basic concept behind air conditioning is said to have been applied in ancient Egypt, where reeds were hung in windows and were moistened with trickling water. The evaporation of water cooled the air blowing through the window. This process also made the air more humid, which can be beneficial in a dry desert climate.[186]
• Hand fan – Hand fans had been used in Egypt as early as 4,000 years ago. Hand fans have been found in King Tut's tomb.[187]
• Pens and Reed pens – Ancient Egyptians had developed writing on papyrus scrolls when scribes used thin reed brushes or reed pens from the Juncus maritimus or sea rush.[188] In his book A History of Writing, Steven Roger Fischer suggests that on the basis of finds at Saqqara, the reed pen might well have been used for writing on parchment as long ago as the First Dynasty or about 3000 BC.
• Spoon – Preserved examples of various forms of spoons used by the ancient Egyptians include those composed of ivory, flint, slate and wood; many of them carved with religious symbols.[189][190]
• Scissors[191][192]
• Set square – Found the tomb of architect Kha.[193]
• Protractors – Found the tomb of architect Kha.[193]
• Copper Pipes – The c.2400 BCE, Pyramid of Sahure, and adjoining temple complex at Abusir, was discovered to have a network of copper drainage pipes.[194]
• Archimedes' screw – Although commonly attributed to Archimedes, the device had been used in Ancient Egypt long before his time.[195] The first records of a water screw, or screw pump, date back to Ancient Egypt before the 3rd century BC.[196] The Egyptian screw, used to lift water from the Nile, was composed of tubes wound round a cylinder; as the entire unit rotates, water is lifted within the spiral tube to the higher elevation. A later screw pump design from Egypt had a spiral groove cut on the outside of a solid wooden cylinder and then the cylinder was covered by boards or sheets of metal closely covering the surfaces between the grooves.
• Screw pump – The screw pump is the oldest positive displacement pump.[197] The first records of a water screw, or screw pump, dates back to Ancient Egypt before the 3rd century BC.[196] The Egyptian screw, used to lift water from the Nile, was composed of tubes wound round a cylinder; as the entire unit rotates, water is lifted within the spiral tube to the higher elevation. A later screw pump design from Egypt had a spiral groove cut on the outside of a solid wooden cylinder and then the cylinder was covered by boards or sheets of metal closely covering the surfaces between the grooves.

Furniture became common first in Ancient Egypt during the Naqada culture.[198] During that period a wide variety of furniture pieces were invented and used.

• Tables – Some very early tables were made and used by the ancient Egyptians[199] around 2500 BC, using wood and alabaster.[200] They were often little more than stone platforms used to keep objects off the floor, though a few examples of wooden tables have been found in tombs. Food and drinks were usually put on large plates deposed on a pedestal for eating. The Egyptians made use of various small tables and elevated playing boards.
• Chairs – Chairs were in existence since at least the Early Dynastic Period of Egypt (c. 3100 BC). They were covered with cloth or leather, were made of carved wood, and were much lower than today's chairs – chair seats were sometimes only 10 inches (25 cm) high.[201]
• Bed – The Egyptians had high bedsteads which were ascended by steps, with bolsters or pillows, and curtains to hang around. The elite of Egyptian society such as its pharaohs and queens even had beds made of wood, sometimes gilded. Often there was a head-rest as well, semi-cylindrical and made of stone, wood, or metal.[202][203]

• Mastaba – Was a predecessor to the Egyptian pyramid. Kings of the Early Dynastic Period were buried there.

Columns with Hathoric capitals

• Column – In ancient Egyptian architecture as early as 2600 BC, the architect Imhotep made use of stone columns whose surface was carved to reflect the organic form of bundled reeds, like papyrus, lotus and palm. In later Egyptian architecture faceted cylinders were also common. Their form is thought to derive from archaic reed-built shrines. Carved from stone, the columns were highly decorated with carved and painted hieroglyphs, texts, ritual imagery and natural motifs. Egyptian columns are famously present in the Great Hypostyle Hall of Karnak (circa 1224 BC), where 134 columns are lined up in sixteen rows, with some columns reaching heights of 24 metres.

Pylon of the Temple of Luxor with the remaining obelisk (of two) in front (the second is in the Place de la Concorde in Paris).

• Hypostyle Architecture
• Capital – The two earliest Egyptian capitals of importance are those based on the lotus and papyrus plants.
• Pylon – Pylons were often decorated with scenes emphasizing a king's authority since it was the public face of a cult building.[204] On the first pylon of the temple of Isis at Philae, the pharaoh is shown slaying his enemies while Isis, Horus and Hathor look on. Other examples of pylons can be seen in Karnak, Luxor, and Edfu.
• Obelisk – The earliest temple obelisk still in its original position is the 68-foot (20.7 m) 120-metric-ton (130-short-ton)[205] red granite Obelisk of Senusret I of the XIIth Dynasty at Al-Matariyyah in modern Heliopolis.[206]

Illustrations of various examples of ancient Egyptian cornices, all of them having cavettos

• Gardens – Gardens appeared in Egypt during the Old Kingdom. There were many types of gardens in Ancient Egypt such as: pleasure gardens, Palace gardens, Temple gardens and Funerary gardens.[207]
• Cavetto – Ancient Egyptian architecture made special use of large cavetto mouldings as a cornice, with only a short fillet (plain vertical face) above, and a torus moulding (convex semi-circle) below. This cavetto cornice is sometimes also known as an "Egyptian cornice", "hollow and roll" or "gorge cornice", and has been suggested to be a reminiscence in stone architecture of the primitive use of bound bunches of reeds as supports for buildings, the weight of the roof bending their tops out.[208]

• Wood carving and Wooden statues – The extreme dryness of the climate of Egypt accounts for the existence of a number of woodcarvings from this remote period. Some wood panels from the tomb of Hosul Egypt, at Sakkarah are of the III. dynasty. The carving consists of Egyptian hieroglyphs and figures in low relief, and the style is extremely delicate and fine. A stool shown on one of the panels has the legs shaped like the fore and hind limbs of an animal, a form common in Egypt for thousands of years.
• Hollow Glass Production and Glassware – Egypt and Mesopotamia were the first civilizations to produce glass works(3,500 BC.). After 1,500 BC. Egyptian craftsmen started to make hollow glass pots.
• Egyptian faience
• Cosmetic palette

Painting on papyrus

• Watercolor paper – Painting on Papyrus was invented in Ancient Egypt long before the invention of Paper.

Hieroglyphs: ankh, basket, Eye of Horus, Sun Disk-(Gard. N5)

• Blue dye and Synthetic dyes – In Egypt, blue was used for the eyebrows on the funeral mask of King Tutankhamun (1341–1323 BC).[209] Importing lapis lazuli by caravan across the desert from Afghanistan to Egypt was very expensive. Beginning in about 2500 BC, the ancient Egyptians began to produce their own blue pigment known as Egyptian blue by grinding silica, lime, copper, and alkalai, and heating it to 800 or 900 °C (1,470 or 1,650 °F). This is considered the first synthetic pigment.[210] Egyptian blue was used to paint wood, papyrus and canvas, and was used to colour a glaze to make faience beads, inlays, and pots. It was particularly used in funeral statuary and figurines and in tomb paintings.
• Pectoral – The pectorals of ancient Egypt were a form of jewelry, often represented as a brooch. These were mostly worn by richer people and the pharaoh.

Nefertari, wife of Ramesses II, holding a sistrum

• Ceremonial dance
• Pair Dancing – In pair dancing, two people of the same gender would perform together.[211] This form of dancing was established by the 6th dynasty.
• Group Dancing – There were two types of Egyptian group dances. One was performed in individual movements that confirmed a theme or idea or was carried out spontaneously as in prehistoric times. Dancers competed with one another, often in groups, substituting movement that were later established in funeral dances rites.

Silver and gold plated trumpet and its wooden mute from the tomb of Tutankhamun (1326–1336 BC)

• Tambourines
• Sistrum – The sistrum was a sacred instrument in ancient Egypt. Perhaps originating in the worship of Bastet, it was used in dances and religious ceremonies, particularly in the worship of the goddess Hathor, with the U-shape of the sistrum's handle and frame seen as resembling the face and horns of the cow goddess.[212]
• Cymbals
• Double reed – Double reeds are used in making instruments in Ancient Egypt as early as 3300 BC.
• Trumpet – The earliest trumpets date back to 1500 BC and earlier. The bronze and silver trumpets from Tutankhamun's grave in Egypt.
• Clarinet[213]
• Melisma – According to Demetrius of Falorene (3rd century A.D), The Egyptian priests used to praise the gods by singing 7 vowels successively producing sweet sounds. This is the first mention of the melisma which is used in many of the Coptic hymns today.[214]
• Syllabtic music style – The Syllabtic music style had been used for 2000 years in the coptic church "Tasbe7a".[215]

• Written records – The Ancient Egyptian sentence found in the tomb of Seth-Peribsen is the world's oldest known sentence[216]

A raised-relief depiction of Amenemhat I accompanied by deities; the death of Amenemhat I is reported by his son Senusret I in the Story of Sinuhe.

• Short story and Story telling – Story-telling started in Ancient Egypt around 200 BC. Among the oldest known stories the "Story of Sinuhe" and the "Tale of the Shipwrecked Sailor".
• Epistle – The ancient Egyptians wrote epistles, most often for pedagogical reasons. Egyptologist Edward Wente (1990) speculates that the Fifth Dynasty Pharaoh Djedkare Isesi (in his many letters sent to his viziers) was a pioneer in the epistolary genre.[217]
• Sebayt and Wisdom literature – The Maxims of Ptahhotep are among the oldest pieces of wisdom literature. It was compiled during the 24th century BC.[218]

Archeologist's drawing of items found in 1895 in an ancient tomb in Naqada, Egypt, thought to resemble the more modern game of skittles. The archeologist conjectured as to the particular arrangement of the items found.[219]

• Bowling – The earliest known forms of bowling date back to ancient Egypt,[220] with wall drawings depicting bowling being found in a royal Egyptian tomb dated to 5200 B.C.[221] and miniature pins and balls in an Egyptian child's grave about 5200 B.C.[222] Remnants of bowling balls were found among artifacts in ancient Egypt going back to the Egyptian protodynastic period in 3200 BC.[223] What is thought to be a child's game involving porphyry (stone) balls, a miniature trilithon, and nine breccia-veined alabaster vase-shaped figures—thought to resemble the more modern game of skittles—was found in Naqada, Egypt in 1895.[219]
• Hockey – Drawings on tombs at Beni Hassan in Menia Governorate show players holding bats made of long palm-tree branches, with a bent end similar to that of the hockey bat. The hockey ball was made of compressed papyrus fibers covered with two pieces of leather in the shape of a semicircle.[224][225]
• Handball – Drawings of this sport are found on the Saqqara tombs, five thousand years old. The ball was made of leather and stuffed with plant fibers or hay, or made of papyrus plants in order to be light and more durable. It was seldom used for more than one match.[224]
• Gymnastics – Ancient Egyptians were the first to play Gymnastics. They even developed three types of Gymnastics which are: Rhythmic Gymnastics,[226] Gymnastics: Consecutive Vault[227] and floor gymnastics.[228]

Detail from an ebony label of the First Dynasty pharaoh Den, depicting him running around the ritual boundary markers as part of the Sed festival

• Weightlifting – Weightlifting was first recorded in ancient Egypt. One method of weightlifting was lifting a heavy sack of sand with one hand and keep it high in a vertical position. The player had to hold that sack of sand for some time and stay in the same position. This rule is still applied in the modern weightlifting.[229][225]
• High jump[225]
• Tug of War – This sport was practiced in the country side.[230][225]
• Tug of Hoop[225][231]
• Equilibrium (sport)[225][232]

Engravings at the Abusir necropolis showing scenes of archery, wrestling, and stick fighting

• Running – Although running was very common in prehistoric times, running races began in Ancient Egypt during the Heb-sed festival as early as 3000 BC.
• Fencing – The first historical evidence from archaeology of a fencing contest was found on the wall of a temple within Egypt built at a time dated to approximately 1190 B.C.[233]
• Tahtib – The oldest traces of tahtib were found on engravings from the archaeological site of Abusir, an extensive necropolis of the Old Kingdom period, located in the south-western suburbs of Cairo. On some of the reliefs of the Pyramid of Sahure (V dynasty, c. 2500 BC);[234] the images and explanatory captions are particularly precise and accurate in their depiction of what seems to be military training using sticks. Tahtib, with archery and wrestling, was then among the three disciplines of warfare taught to soldiers.

• Frying – Frying is believed to have first appeared in the ancient Egyptian kitchen, during the Old Kingdom, around 2500 BCE.[235]
• Banquet – Depictions of banquets can be found in paintings from both the Old Kingdom and New Kingdom. They usually started sometime in the afternoon. Men and women were separated unless they were married. Seating varied according to social status, with those of the highest status sitting on chairs, those slightly lower sat on stools and those lowest in rank sat on the raw floor. Before the food was served, basins were provided along with aromatics and cones of scented fat were lit to spread pleasant smells or to repel insects, depending on the type.[236]
• Lettuce – Lettuce was first cultivated in ancient Egypt for the production of oil from its seeds. This plant was probably selectively bred by the Egyptians into a plant grown for its edible leaves,[237] with evidence of its cultivation appearing as early as 2680 BC. Lettuce was considered a sacred plant of the reproduction god Min, and it was carried during his festivals and placed near his images. The plant was thought to help the god "perform the sexual act untiringly."[238] Its use in religious ceremonies resulted in the creation of many images in tombs and wall paintings. The cultivated variety appears to have been about 75 cm (30 in) tall and resembled a large version of the modern romaine lettuce. These upright lettuces were developed by the Egyptians and passed to the Greeks, who in turn shared them with the Romans.

Fruits of Balanites aegyptiaca from Saqqara. Mastaba of Perneb, 5th dynasty of Egypt. MET.

• Foie gras and force-feeding – The technique of gavage dates as far back as 2500 BC, when the ancient Egyptians began keeping birds for food and deliberately fattened the birds through force-feeding.[239] Today, France is by far the largest producer and consumer of foie gras, though it is produced and consumed worldwide, particularly in other European nations, the United States, and China.[240]
• Hardtack and Biscuits – versions using various grains date back to Ancient Rome, and as far back as Ancient Egypt.[241]
• Smy – thickened milk[lower-alpha 2] documented as existent in ancient Egypt.
• Egyptian cheese - Archaeological evidence for making cheese in Egypt goes back about 5,000 years. In 2018, archeologists from Cairo University and the University of Catania reported the discovery of the oldest known cheese from Egypt. Discovered in the Saqqara necropolis, it is around 3200 years old.[243] Earlier, remains identified as cheese were found in the funeral meal in an Egyptian tomb dating around 2900 BC.[244] Visual evidence of Egyptian cheesemaking was found in Egyptian tomb murals in approximately 2000 BC.[245]
• Yeast, Dough and Leavened bread – The earliest definite records of yeast come from Ancient Egypt.[246]
• Desserts and Pies – During the Egyptian Neolithic period or New Stone Age period, the use of stone tools shaped by polishing or grinding, the domestication of plants and animals, the establishment of permanent villages, and the practice of crafts such as pottery and weaving became common. Early pies were in the form of flat, round or freeform crusty cakes called galettes consisting of a crust of ground oats, wheat, rye, or barley containing honey inside. These galettes developed into a form of early sweet pastry or desserts, evidence of which can be found on the tomb walls of the Pharaoh Ramesses II, who ruled from 1304 to 1237 BC, located in the Valley of the Kings.
• Boiled eggs – In Thebes, Egypt, the tomb of Haremhab, dating to approximately 1420 BCE, shows a depiction of a man carrying bowls of ostrich eggs and other large eggs, presumably those of the pelican, as offerings.[247] In ancient Rome, eggs were preserved using a number of methods and meals often started with an egg course.
• Marshmallows – The first marshmallows were produced in Egypt around 2000 B.c. and were made by mixing Mallow sap, honey, grains and baked into cakes. Marshmallows were only served to the Gods of Ancient Egypt and pharaohs, as a candy or a dessert.[248][249]

• Glove[250]
• Crown – Royal headdress was used in Egypt since the Predyanstic times. The king of Lower Egypt wore the Deshret crown while the king of Upper Egypt wore Hedjet. The Deshret and the Hedjet were found in Egyptian inscriptions as early as 3500 BC.[251]
• Shirt – The world's oldest preserved garment, discovered by Flinders Petrie, is a "highly sophisticated" linen shirt from a First Dynasty Egyptian tomb at Tarkan, dated to c. 3000 BC: "the shoulders and sleeves have been finely pleated to give form-fitting trimness while allowing the wearer room to move. The small fringe formed during weaving along one edge of the cloth has been placed by the designer to decorate the neck opening and side seam."[252]
• Hat – One of the first pictorial depictions of a hat appears in a tomb painting from Thebes, Egypt, which shows a man wearing a conical straw hat, dated to around 3200 BC. Hats were commonly worn in ancient Egypt. Many upper-class Egyptians shaved their heads, then covered it in a headdress intended to help them keep cool.
• Umbrella – he earliest known parasols in Ancient Egyptian art date back to the Fifth Dynasty, around 2450 BC.[253] The parasol is found in various shapes. In some instances it is depicted as a flabellum, a fan of palm-leaves or coloured feathers fixed on a long handle, resembling those now carried behind the Pope in processions.
• Hairpin – Hairpins made of metal, ivory, bronze, carved wood, etc. were used in ancient Egypt[254] for securing decorated hairstyles. Such hairpins suggest, as graves show, that many were luxury objects among the Egyptians and later the Greeks, Etruscans, and Romans.
• Shaving and Hygiene
• Cosmetics
• Kohl[255]
• Liniment – made from Castor oil.[255]
• Henna and Hair dye – Ancient Egyptian, Ahmose-Henuttamehu (17th Dynasty, 1574 BCE): was probably a daughter of Seqenenre Tao and Ahmose Inhapy. Smith reports that the mummy of Henuttamehu's own hair had been dyed a bright red at the sides, probably with henna.[256]
• Perfume – Evidence from jars dating back to 3000 B.C. with remains of mixtures of oils and fats indicates the use of perfumes by the Ancient Egyptians in the Early bronze age.[257][258]
• High-heeled shoe – Paintings circa 3,500 BC. show images of men and women wearing high-heeled shoes. High-heeled shoes was also used by butchers to make them move easily over the dead animals.[259]

Hieroglyphs on stela in Louvre, circa 1321 BC

• Egyptian hieroglyphs – Hieroglyphic symbol systems developed in the second half of the 4th millennium BC, such as the clay labels of a Predynastic ruler called "Scorpion I" (Naqada IIIA period, c. 33rd century BC) recovered at Abydos (modern Umm el-Qa'ab) in 1998 or the Narmer Palette (c. 31st century BC).[260]
• Hieratic – Hieratic developed as a cursive form of hieroglyphic script in the Naqada III period, roughly 3200–3000 BCE.[261]
• Demotic – Early Demotic (often referred to by the German term Frühdemotisch) developed in Lower Egypt during the later part of the Twenty-fifth Dynasty, particularly found on steles from the Serapeum at Saqqara.

A specimen of Proto-Sinaitic script, one of the earliest (if not the very first) phonemic scripts

• Alphabet – The history of the alphabet started in ancient Egypt. Egyptian writing had a set of some 24 hieroglyphs that are called uniliterals,[262] to represent syllables that begin with a single consonant of their language, plus a vowel (or no vowel) to be supplied by the native speaker. These glyphs were used as pronunciation guides for logograms, to write grammatical inflections, and, later, to transcribe loan words and foreign names.[263] In the Middle Bronze Age, an apparently "alphabetic" system known as the Proto-Sinaitic script appears in Egyptian turquoise mines in the Sinai peninsula dated to circa the 15th century BC, apparently left by Canaanite workers. In 1999, John and Deborah Darnell discovered an even earlier version of this first alphabet at Wadi el-Hol dated to circa 1800 BC and showing evidence of having been adapted from specific forms of Egyptian hieroglyphs that could be dated to circa 2000 BC, strongly suggesting that the first alphabet had been developed about that time.[264] Based on letter appearances and names, it is believed to be based on Egyptian hieroglyphs.[265] This script had no characters representing vowels, although originally it probably was a syllabary, but unneeded symbols were discarded.
• Rubric – red ink was used by Ancient Egyptians to emphasize an important text.

Senet gaming board inscribed for Amenhotep III with separate sliding drawer, c. 1390–1353 BC

• Mehen – Evidence of the game of Mehen is found from the Predynastic period dating from approximately 3000 BC and continues until the end of the Old Kingdom, around 2300 BC.[266]
• Senet – Senet, found in Predynastic and First Dynasty burials of Egypt, c. 3500 BC and 3100 BC respectively,[267] is the oldest board game known to have existed. Senet was pictured in a fresco found in Merknera's tomb (3300–2700 BC).[268][269]
• Dice – The Egyptian game of senet was played with flat two-sided throwsticks which indicated the number of squares a player could move, and thus functioned as a form of dice. Senet was played before 3000 BC and up to the 2nd century AD.[270]
• Surveying – Surveying has occurred since humans built the first large structures. In ancient Egypt, a rope stretcher would use simple geometry to re-establish boundaries after the annual floods of the Nile River. The almost perfect squareness and north–south orientation of the Great Pyramid of Giza, built c. 2700 BC, affirm the Egyptians' command of surveying.
• Histiography and King lists – The pharaohs of Egypt used to glorify their ancestors. The Den seal impressions is the oldest King list in the world dating to 3000 BC.[271] The Palermo Stone is one of seven surviving fragments of a stele known as the Royal Annals of the Old Kingdom of Ancient Egypt. The stele contained a list of the kings of Egypt from the First Dynasty (~3150–2890 BCE) through to the early part of the Fifth Dynasty (approx 2392–2283 BCE) and noted significant events in each year of their reigns. It was probably made during the Fifth Dynasty.[272] These inscriptions are considered as the oldest History studies.
• Logbooks – The Diary of Merer (Papyrus Jarf A and B) is the name for papyrus logbooks written over 4,500 years ago that record the daily activities of stone transportation from the Tura limestone quarry to and from Giza during the 4th Dynasty. They are the oldest known papyri with text. The text was found in 2013 by a French mission under the direction of archaeologists Pierre Tallet of Paris-Sorbonne University and Gregory Marouard in a cave in Wadi al-Jarf on the Red Sea coast.[273][274][275][276]
• Eye liner
• Tobacco pipe[277][278]
• Pest control – As long ago as 3000 BC in Egypt, cats were used to control pests of grain stores such as rodents.[279][280] Mongooses were introduced into homes to control rodents and snakes, probably by the ancient Egyptians.[281]
• Thumb signal – The Egyptian Thumb up signified hope and victory while the Thumb down signified illness or defeat.
• Wedding ring – It is commonly believed that the first examples of wedding rings were found in ancient Egypt. Relics dating to 6,000 years ago, including papyrus scrolls, are evidence of the exchange of braided rings of hemp or reeds between spouses. Ancient Egypt considered the circle to be a symbol of eternity, and the ring served to signify the perpetual love of the spouses. This was also the origin of the custom of wearing the wedding ring on the ring finger of the left hand, because the ancient Egyptians believed that this finger enclosed a special vein that was connected directly to the heart,[282] denominated in Latin the "Vena amoris".
• Birthday Celebration – The birthday of a pharaoh was considered a national holiday.[283]
• Magic Wand[284]
• Evil eye concept
• Amulets

Designs on some of the labels or token from Abydos, carbon-dated to circa 3400–3200 BC and among the earliest form of writing in Egypt.[285] They are virtually similar to contemporary clay tags from Uruk, Mesopotamia.[286]

• Invention of Writing – Disputed with Sumer. Writing was invented in the Middle East, however there's no consensus among scholars where exactly it was invented. Formerly, Scholars used to consider Cuneiform script as the oldest known writing system dating back to (3,400 – 3,100 BC.). It was even thought that the idea of writing travelled from Mesopotamia to Egypt. This changed however with the discovery of Tomb U-j. Archaeologists found clay labels inscribed with fully developed Hieroglyphs dating back to 3,400 – 3,200 BC. This discovery started a debate over whether writing began in Egypt or Mesopotamia. Today, the general consensus among scholars is that both civilizations developed writing system independently and during the same period.[287] Modern discoveries even revealed possibly undeciphered scripts such as the Vinca symbols in the Balkans (5,000 BC.)[288] or the Jiahu symbols in china (6,000 BC.).[289]
• Carbon – Disputed with Sumer. By 2,500 BC, Carbon was used in both Ancient Egypt and Sumer.
• Circumnavigation of Africa – A tale told by Herodotus that Pharaoh Necho II commissioned a naval expedition to circumnavigate Africa. However, the origin of this story is questioned by modern scholars.[290]
• Dockyard – Egypt's oldest harbour is Wadi al-Jarf, which is contemporary with Lothal in the Indus Valley Civilization.
• Proto-Currency – Long before the first currency (which was invented in the Kingdom of Lydia), the Egyptians used a system of Proto-currency based on metal weighs. The Deben was often used.[291][292][293]
• Banks and Central banks – Since there was no coins at the time of Ancient Egypt, Banks during that time were similar to grain warehouses. Some scholars suggest that the Egyptian grain-banking system became so well-developed that it was comparable to major modern banks, both in terms of its number of branches and employees, and in terms of the total volume of transactions. During the rule of the Greek Ptolemies, the granaries were transformed into a network of banks centered in Alexandria, where the main accounts from all of the Egyptian regional grain-banks were recorded. This became the site of one of the earliest known government central banks, and may have reached its peak with the assistance of Greek bankers.[294]
• Lute, Harp and Lyre – The origin of these instruments are not known but they were used in Sumer and Ancient Egypt as early as the 4th millennium BC.
• Pentatonic scale – Although some evidence suggests that it has been used in prehistoric times, It's highly possible that the pentatonic scale was invented in Ancient Egypt during the Old Kingdom of Egypt circa 2600 b.c.[295]
• Frozen desserts – The origins of frozen desserts are unknown. Ancient Egyptian hieroglyphs show a snow-filled vessel next to fruit juice.
• Plough – Ploughs were used by the Egyptians and Sumerians around 4000 B.C.[52]
• Candle – Ancient Egyptians developed torches that were similar to candles. However, the invention of the candle is given to the Romans.[296]
• Ben oil
• Tattoo – In 2018, the oldest figurative tattoos in the world were discovered on two mummies from Egypt which are dated between 3351 and 3017 BCE.[297]
• Precession of equinox – The credit of this discovery is given to the Greek Hipparchus. However, claims have been made that precession was known in Ancient Egypt during the dynastic era, prior to the time of Hipparchus (Ptolemaic period). However, these claims remain controversial. Some buildings in the Karnak temple complex, for instance, allegedly were oriented toward the point on the horizon where certain stars rose or set at key times of the year.
• Boxing – The earliest evidence of boxing dates back to Egypt around 3000 BC.[298][225]

A triangle with sides a, b, and c.

• Heron's formula – Hero described a method for iteratively computing the square root of a number.[303] Today, however, his name is most closely associated with Heron's formula for finding the area of a triangle from its side lengths.

• He also devised a method for calculating cube roots in the 1st century AD.[304] He also designed a shortest path algorithm, Given two points A and B on one side of a line, find C a point on the straight line, that minimizes AC+BC.
• Vending machine – The first vending machine was also one of his constructions; when a coin was introduced via a slot on the top of the machine, a set amount of holy water was dispensed. This was included in his list of inventions in his book Mechanics and Optics. When the coin was deposited, it fell upon a pan attached to a lever. The lever opened up a valve which let some water flow out. The pan continued to tilt with the weight of the coin until it fell off, at which point a counter-weight would snap the lever back up and turn off the valve.[305]

• Force pump – The force pump was widely used in the Roman world, and one application was in a fire-engine.[306]
• Heron's fountain – A standalone fountain that operates under self-contained hydro-static energy; now called Heron's fountain.[306]
• In optics, Hero formulated the principle of the shortest path of light: If a ray of light propagates from point A to point B within the same medium, the path-length followed is the shortest possible. In his Catoptrics (1st century CE), he showed that the ordinary law of reflection off a plane surface follows from the premise that the total length of the ray path is a minimum.[307] It was nearly 1000 years later that Alhacen expanded the principle to both reflection and refraction, and the principle was later stated in this form by Pierre de Fermat in 1662; the most modern form is that the optical path is stationary.
• A wind-wheel operating an organ, marking the first instance in history of wind powering a machine.[308][309]
• Hero also invented many mechanisms for the Greek theater, including an entirely mechanical play almost ten minutes in length, powered by a binary-like system of ropes, knots, and simple machines operated by a rotating cylindrical cogwheel. The sound of thunder was produced by the mechanically-timed dropping of metal balls onto a hidden drum.[306]
• A programmable cart that was powered by a falling weight. The "program" consisted of strings wrapped around the drive axle.[310]
• Automatic door – In the 1st century AD, mathematician Heron of Alexandria in Roman Egypt invented the first known automatic door. He described two different automatic door applications. The first application used heat from a fire lit by the city's temple priest. After a few hours atmospheric pressure built up in a brass vessel causing it to pump water into adjacent containers. These containers acted as weights that, through a series of ropes and pulleys, would open the temple's doors at about the time people were to arrive for prayer. Heron used a similar application to open the gates to the city.[311]

• Pappus's hexagon theorem
• Pappus's centroid theorem

• Ptolemy's world map – It included 8,000 locations from Shetland islands to the Ethiopian plateau and from the Canary islands to China. Significant contributions of Ptolemy's map is the first use of longitudinal and latitudinal lines as well as specifying terrestrial locations by celestial observations. The Geography was translated from Greek into Arabic in the 9th century and played a role in the work of al-Khwārizmī before lapsing into obscurity. The idea of a global coordinate system revolutionized European geographical thought, however, and inspired more mathematical treatment of cartography.[312]
• Ptolemy was the first to measure the angles of incidence and refraction but failed to understand the relation between them (Snell's Law).[313][314]
• Ptolemy's intense diatonic scale – Ptolemy's intense diatonic scale is a tuning for the diatonic scale proposed by Ptolemy,[315] declared by Zarlino to be the only tuning that could be reasonably sung, and corresponding with modern just intonation.[316] It is also supported by Giuseppe Tartini.[317]

The earliest known surviving pair of socks, created by naalbinding. Dating from 300 to 500, these were excavated from Oxyrhynchus on the Nile in Egypt. The split toes were designed for use with sandals. On display in the Victoria and Albert museum, reference 2085&A-1900.

• Saqiyah – Paddle-driven water-lifting wheels had appeared in ancient Egypt by the 4th century BCE.[318] According to John Peter Oleson, both the compartmented wheel and the hydraulic noria appeared in Egypt by the 4th century BCE, with the sakia being invented there a century later. This is supported by archeological finds at Faiyum, where the oldest archeological evidence of a water wheel has been found, in the form of a sakia dating back to the 3rd century BCE. A papyrus dating to the 2nd century BCE also found in Faiyum mentions a water wheel used for irrigation, a 2nd-century BC fresco found at Alexandria depicts a compartmented sakia, and the writings of Callixenus of Rhodes mention the use of a sakia in the Ptolemaic Kingdom during the reign of Ptolemy IV Philopator in the late 3rd century BCE.[319]
• Fifteen centuries before Braille, wood-carving techniques were in use in the Catechical school of Alexandria by blind scholars to read and write.[320][321]

• Catechesis – The oldest Catechical school in the world is the catechical school of Alexandria.[322]
• Theology – Origen an Egyptian scholar of Alexandria is considered to be the father of Theology.[323][324]
• Monasticism – Another major contribution made by the Copts in Egypt to Christianity was the creation and organization of monasticism. Worldwide Christian monasticism stems, either directly or indirectly, from the Egyptian example. The most prominent figures of the monastic movement were Anthony the Great, Paul of Thebes, Macarius the Great, Shenouda the Archimandrite and Pachomius the Cenobite. By the end of the 5th century, there were hundreds of monasteries, and thousands of cells and caves scattered throughout the Egyptian desert. Since then pilgrims have visited the Egyptian Desert Fathers to emulate their spiritual, disciplined lives. Saint Basil the Great Archbishop of Caesarea Mazaca, and the founder and organiser of the monastic movement in Asia Minor, visited Egypt around 357 AD and his monastic rules are followed by the Eastern Orthodox Churches. Saint Jerome, who translated the Bible into Latin, came to Egypt while en route to Jerusalem around 400 AD and left details of his experiences in his letters. Saint Benedict founded the Benedictine Order in the 6th century on the model of Saint Pachomius, although in a stricter form. Coptic Christians practice male circumcision as a rite of passage.[325]

Mohamed M. Atalla

The invention of the MOSFET (metal–oxide–semiconductor field-effect transistor, or MOS transistor), by Mohamed M. Atalla and Dawon Kahng at Bell Labs in 1959,[347] enabled the practical use of metal–oxide–semiconductor (MOS) transistors as memory cell storage elements, a function previously served by magnetic cores. MOS memory was developed by John Schmidt at Fairchild Semiconductor in 1964.[348]

The MOSFET forms the basis of modern electronics,[349] and is the basic element in most modern electronic equipment.[350] It is the most common transistor in electronics,[351] and the most widely used semiconductor device in the world.[352] It has been described as the "workhorse of the electronics industry"[353] and "the base technology" of the late 20th to early 21st centuries. MOSFET scaling and miniaturization (see List of semiconductor scale examples) have been the primary factors behind the rapid exponential growth of electronic semiconductor technology since the 1960s,[354] as the rapid miniaturization of MOSFETs has been largely responsible for the increasing transistor density, increasing performance and decreasing power consumption of integrated circuit chips and electronic devices since the 1960s.[355]

• Aluminum gate and Metal gate – A metal gate, in the context of a lateral metal-oxide-semiconductor (MOS) stack, is just that—the gate material is made from a metal. The first MOSFET (metal-oxide-semiconductor field-effect transistor, or MOS transistor) was invented by Egyptian engineer Mohamed Atalla and Korean engineer Dawon Kahng at Bell Labs in 1959, and demonstrated in 1960.[356] They used silicon as channel material and a non-self-aligned aluminium (Al) gate.[357]
• Atalla Box – He invented the first hardware security module (HSM),[358] dubbed the "Atalla Box", a security system which encrypted PIN and ATM messages, and protected offline devices with an un-guessable PIN-generating key.[359] He commercially released the "Atalla Box" in 1973. The success of the "Atalla Box" led to the wide adoption of PIN-based hardware security modules.[360] Its PIN verification process was similar to the later IBM 3624.[361] By 1998 an estimated 70% of all ATM transactions in the United States were routed through specialized Atalla hardware modules,[362] and by 2003 the Atalla Box secured 80% of all ATM machines in the world,[363] increasing to 85% as of 2006.[364] Atalla's HSM products protect 250 million card transactions every day as of 2013,[365] and still secure the majority of the world's ATM transactions as of 2014.[358]
• Atalla Key Block or Block cipher – The root of all cryptographic block formats used within the Payment Card Industry Data Security Standard (PCI DSS) and American National Standards Institute (ANSI) standards lies with the Atalla Key Block (AKB), which was a key innovation of the Atalla Box, the first hardware security module (HSM). It was developed in 1972 by Mohamed M. Atalla, founder of Atalla Corporation (now Utimaco Atalla), and released in 1973. The AKB was a key block, which is required to securely interchange symmetric keys or PINs with other actors of the banking industry. This secure interchange is performed using the AKB format.[366]
• Charge trap flash – The original MOSFET (metal-oxide-semiconductor field-effect transistor, or MOS transistor) was invented by Egyptian engineer Mohamed M. Atalla and Korean engineer Dawon Kahng at Bell Labs in 1959, and demonstrated in 1960.[367] Kahng went on to invent the floating-gate MOSFET with Simon Min Sze at Bell Labs, and they proposed its use as a floating-gate (FG) memory cell, in 1967.[368] This was the first form of non-volatile memory based on the injection and storage of charges in a floating-gate MOSFET,[369] which later became the basis for EPROM (erasable PROM), EEPROM (electrically erasable PROM) and flash memory technologies.[370][371]
• Depletion and enhancement modes – The first MOSFET (metal-oxide-semiconductor field-effect transistor) demonstrated by Egyptian engineer Mohamed M. Atalla and Korean engineer Dawon Kahng at Bell Labs in 1960 was an enhancement mode silicon semiconductor device.[372] In 1963, both depletion and enhancement mode MOSFETs were described by Steve R. Hofstein and Fred P. Heiman at RCA Laboratories.[373]
• Display driver – The use of integrated circuit technology to drive a display driver chip dates back to the late 1960s. Its development was led by Howard C. Borden, Gerald P. Pighini, and Egyptian engineer Mohamed M. Atalla, at HP Associates and HP Labs, who had engaged in research and development (R&D) on practical LEDs between 1962 and 1968.[374]
• FET amplifier and Thermal oxidation – The basic principle of the field-effect transistor (FET) amplifier was first proposed by Austro-Hungarian physicist Julius Edgar Lilienfeld in 1925.[375] However, his early FET concept was not a practical design.[351] The FET concept was later also theorized by Oskar Heil in the 1930s and William Shockley in the 1940s, but there was no working practical FET built at the time. A breakthrough came with the work of Egyptian engineer Mohamed M. Atalla in the late 1950s.[376] He developed the method of surface passivation, which later became critical to the semiconductor industry as it made possible the mass-production of silicon semiconductor technology, such as integrated circuit (IC) chips.[377][351][378] For the surface passivation process, he developed the method of thermal oxidation, which was a breakthrough in silicon semiconductor technology.[379] The surface passivation method was presented by Atalla in 1957.[380]
• Gate dielectric – The earliest gate dielectric used in a field-effect transistor was silicon dioxide (SiO²). The silicon and silicon dioxide surface passivation process was developed by Egyptian engineer Mohamed M. Atalla at Bell Labs during the late 1950s, and then used in the first MOSFETs (metal-oxide-semiconductor field-effect transistors). Silicon dioxide remains the standard gate dielectric in MOSFET technology.[381]
• Gate oxide (With multiple varieties: 20 µm process, 10 nm process, 130 nm process) - The first MOSFET (metal-oxide-semiconductor field-effect transistor, or MOS transistor) was invented by Egyptian engineer Mohamed Atalla and Korean engineer Dawon Kahng at Bell Labs in 1959.[382] In 1960, Atalla and Kahng fabricated the first MOSFET with a gate oxide thickness of 100 nm, along with a gate length of 20 µm.[383] In 1987, Bijan Davari led an IBM research team that demonstrated the first MOSFET with a 10 nm gate oxide thickness, using tungsten-gate technology.[384]
• Internet security – In 1972, Egyptian engineer Mohamed M. Atalla filed U.S. Patent 3,938,091 for a remote PIN verification system, which utilized encryption techniques to assure telephone link security while entering personal ID information, which would be transmitted as encrypted data over telecommunications networks to a remote location for verification. This was a precursor to Internet security and e-commerce.[385] At the National Association of Mutual Savings Banks (NAMSB) conference in January 1976, Atalla Corporation (founded by Mohamed Atalla) and Bunker Ramo Corporation (founded by George Bunker and Simon Ramo) introduced the earliest products designed for dealing with online security. Atalla announced an upgrade to its Identikey hardware security module, called the Interchange Identikey. It added the capabilities of processing online transactions and dealing with network security.
• LED lamp and LED display – The first low-powered LEDs were developed in the early 1960s, and only produced light in the low, red frequencies of the spectrum. In 1968, the first commercial LED lamps were introduced: Hewlett-Packard's LED display,[386] which was developed under Howard C. Borden, Gerald P. Pighini, and Egyptian engineer Mohamed M. Atalla,[374] and Monsanto Company's LED indicator lamp.[386] However, early LED lamps were inefficient and could only display deep red colors, making them unsuitable for general lighting and restricting their usage to numeric displays and indicator lights.
• Microprocessor – The microprocessor has origins in the development of the MOSFET (metal-oxide-semiconductor field-effect transistor, or MOS transistor),[387] which was first demonstrated by Mohamed M. Atalla and Dawon Kahng of Bell Labs in 1960.[388]
• MOS integrated circuit – The MOSFET is the most widely used type of transistor and the most critical device component in integrated circuit (IC) chips.[389] The monolithic integrated circuit chip was enabled by the surface passivation process, which electrically stabilized silicon surfaces via thermal oxidation, making it possible to fabricate monolithic integrated circuit chips using silicon. The surface passivation process was developed by Mohamed M. Atalla at Bell Labs in 1957. This was the basis for the planar process, developed by Jean Hoerni at Fairchild Semiconductor in early 1959, which was critical to the invention of the monolithic integrated circuit chip by Robert Noyce later in 1959.[390][391][392] The same year, Atalla used his surface passivation process to invent the MOSFET with Dawon Kahng at Bell Labs.[377][351] This was followed by the development of clean rooms to reduce contamination to levels never before thought necessary, and coincided with the development of photolithography[393] which, along with surface passivation and the planar process, allowed circuits to be made in few steps.
• MOSFET – In 1955, Carl Frosch and Lincoln Derrick accidentally covered the surface of silicon wafer with a layer of silicon dioxide. They showed that oxide layer prevented certain dopants into the silicon wafer, while allowing for others, thus what they discovered was passivation of semiconductor surface using thermal oxidation. At Shockley Semiconductor, Shockley had circulated the preprint of their article in December 1956 to all his senior stuff, including Jean Hoerni.[394][395] Mohamed M. Atalla at the time was dealing with the problem of surface states. He picked up Frosch's work on oxidation, attempting to passivate the surface of silicon through the formation of oxide layer over it. He thought that growing a very thin high quality thermally grown SiO₂ on top of a clean silicon wafer would neutralize surface states enough to make a practical working transistor. He wrote his findings in his BTL memos in 1957, before presenting his work at an Electrochemical Society meeting in 1958. The next year John L. Moll described a MOS diode and coined the name "MOS" in the conference paper on the MOS diode. J.R. Ligenza and W.G. Spitzer, who studied the mechanism of thermally grown oxides, managed to fabricate the first high quality Si/SiO₂ stack.[396][351][377][397][398][399][400][401]
• MOS capacitor and Field effect (semiconductor) – The MOS capacitor structure is the heart of the MOSFET. Consider a MOS capacitor where the silicon base is of p-type. If a positive voltage is applied at the gate, holes which are at the surface of the p-type substrate will be repelled by the electric field generated by the voltage applied. At first, the holes will simply be repelled and what will remain on the surface will be immobile (negative) atoms of the acceptor type, which creates a depletion region on the surface. Remember that a hole is created by an acceptor atom, e.g. Boron, which has one less electron than Silicon. One might ask how can holes be repelled if they are actually non-entities? The answer is that what really happens is not that a hole is repelled, but electrons are attracted by the positive field, and fill these holes, creating a depletion region where no charge carriers exist because the electron is now fixed onto the atom and immobile.
• Nanotechnology, Nanocircuitry Nanoelectronics and Molecular scale electronics – In 1960, Egyptian engineer Mohamed Atalla and Korean engineer Dawon Kahng at Bell Labs fabricated the first MOSFET (metal-oxide-semiconductor field-effect transistor) with a gate oxide thickness of 100 nm, along with a gate length of 20 µm.[402] In 1962, Atalla and Kahng fabricated a nanolayer-base metal–semiconductor junction (M–S junction) transistor that used gold (Au) thin films with a thickness of 10 nm.[403]
• NMOS logic and PMOS logic – The MOSFET was invented by Egyptian engineer Mohamed M. Atalla and Korean engineer Dawon Kahng at Bell Labs in 1959, and demonstrated in 1960.[347] They fabricated both PMOS and NMOS devices with a 20 µm process. However, the NMOS devices were impractical, and only the PMOS type were practical devices.[378]
• p–n junction isolation – Before the invention of the integrated circuit, discrete diodes and transistors exhibited relatively high reverse-bias junction leakages and low breakdown voltage, caused by the large density of traps at the surface of single crystal silicon. The solution to this problem was the surface passivation process developed by Egyptian engineer Mohamed Atalla at Bell Telephone Laboratories (BTL). He discovered that when a thin layer of silicon dioxide was grown on the surface of silicon where a p–n junction intercepts the surface, the leakage current of the junction was reduced by a factor from 10 to 100. This showed that the oxide reduces and stabilizes many of the interface and oxide traps. Oxide-passivation of silicon surfaces allowed diodes and transistors to be fabricated with significantly improved device characteristics, while the leakage path along the surface of the silicon was also effectively shut off. This became one of the fundamental isolation capabilities necessary for planar technology and integrated circuits.[404] According to Fairchild Semiconductor engineer Chih-Tang Sah, Atalla's surface passivation method was critical to the development of the silicon integrated circuit.[404][405]
• Planar process – Surface passivation, the process by which a semiconductor surface is rendered inert, and does not change semiconductor properties as a result of interaction with air or other materials in contact with the surface or edge of the crystal, was first developed by Egyptian engineer Mohamed M. Atalla at BTL in the late 1950s.[406][407]
• PIN – Mohamed M. Atalla invented the first PIN-based hardware security module (HSM),[358] dubbed the "Atalla Box", a security system which encrypted PIN and ATM messages, and protected offline devices with an un-guessable PIN-generating key.[359] In 1972, Atalla filed U.S. Patent 3,938,091 for his PIN verification system, which included an encoded card reader and described a system that utilized encryption techniques to assure telephone link security while entering personal ID information that was transmitted to a remote location for verification.[385]
• Secure cryptoprocessor and hardware security module – The hardware security module (HSM), a type of secure cryptoprocessor, was invented by Egyptian-American engineer Mohamed M. Atalla,[358] in 1972.[365]
• Semiconductor device fabrication – The first metal–oxide–silicon field-effect transistors (MOSFETs) were fabricated by Egyptian engineer Mohamed M. Atalla and Korean engineer Dawon Kahng at Bell Labs between 1959 and 1960.[378] There were originally two types of MOSFET technology, PMOS (p-type MOS) and NMOS (n-type MOS).[408] Both types were developed by Atalla and Kahng when they originally invented the MOSFET, fabricating both PMOS and NMOS devices at 20 µm and 10 µm scales.[357]
• Silicon wafer – In the 1950s, Mohamed Atalla investigated the surface properties of silicon semiconductors at Bell Labs, where he adopted a new method of semiconductor device fabrication, coating a silicon wafer with an insulating layer of silicon oxide, so that electricity could reliably penetrate to the conducting silicon below, overcoming the surface states that prevented electricity from reaching the semiconducting layer. This is known as surface passivation, a method that later became critical to the semiconductor industry as it made possible the mass-production of silicon integrated circuits (ICs).[409][410][378] The surface passivation method was presented by Atalla in 1957,[380] and was later the basis for the metal-oxide-semiconductor (MOS) process invented by Atalla and Dawon Kahng in 1959.
• Telephone banking – In 1972, Egyptian engineer Mohamed M. Atalla, the founder of Atalla Corporation, filed U.S. Patent 3,938,091 for a remote personal verification system which utilized encryption techniques to assure telephone link security while entering personal ID information, which would be transmitted as encrypted data over telecommunications networks to a remote location for verification. This was a precursor to telephone banking.[385] The patent mentioned the system's application for the use of a credit card over a telephone call.[411]
• His invention of the MOSFET was initially overlooked at Bell, which led to him resigning from Bell and joining Hewlett-Packard (HP), founding its Semiconductor Lab in 1962 and then HP Labs in 1966, before leaving to join Fairchild Semiconductor, founding its Microwave & Optoelectronics division in 1969. His work at HP and Fairchild included research on Schottky diode, gallium arsenide (GaAs), gallium arsenide phosphide (GaAsP), indium arsenide (InAs) and light-emitting diode (LED) technologies.[412]