List of acronyms: H
This list contains acronyms, initialisms, and pseudo-blends that begin with the letter H.
For the purposes of this list:
- acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome, pronounced to rhyme with cars
- initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc, pronounced cee dee
- pseudo-blend = an abbreviation whose extra or omitted letters mean that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).
- (a) = acronym, e.g.: SARS – (a) severe acute respiratory syndrome
- (i) = initialism, e.g.: CD – (i) compact disc
- (p) = pseudo-blend, e.g.: UNIFEM – (p) United Nations Development Fund for Women
- (s) = symbol (none of the above, representing and pronounced as something else; for example: MHz – Megahertz)
(Main list of acronyms)
HA
- ha – (s) Hausa language (ISO 639-1 code) – Hectare
- HA – (s) Haiti (FIPS 10-4 country code) – (i) High Availability
- HAARP – (a) High Frequency Active Auroral Research Program
- HAART – (a) Highly Active Anti-Retroviral Therapy
- HAI – (i) Human Awareness Institute
- HAL – (i) Hardware Abstraction Layer
- HALO – (a) High Altitude Low Opening (parachute jump)
- HALT
- (a) Highly Accelerated Life Test
- (a) Hungry Angry Lonely Tired
- HAM – (s) Amateur radio operator
- HAMR - (a) Heat-assisted magnetic recording
- HANS – (a) Head And Neck Support (device used in many race cars)
- HARM – (a) High-speed Anti-Radiation Missile
- hat – (s) Haitian Creole language (ISO 639-2 code)
- HAT – (i/a) Highest Astronomical Tide (nautical charts) – (a) Hungarian Automated Telescope
- hau – (s) Hausa language (ISO 639-2 code)
- HAW – (i) Heavy Antitank Weapon
- HAWK – (a) Homing All the Way Killer (air defence system)
- HAZ – (i) Heat-Affected Zone
- HAZMAT – (p) Hazardous Materials
HB
- HBCD – (p) HexaBromoCycloDodecane
- HBCI – (i) Home Banking Computer Interface
- HBO – (i) Home Box Office
- HBR – (i) Harvard Business Review
- HBT – (i) Heterojunction Bipolar Transistor
- HBV – (i) Hepatitis B Virus
HC
- h.c. – (i) honoris causa (Latin, "for the sake of honour")
- HCCI – (i) Homogeneous Charge Compression Ignition
- HCF – (i) Highest Common Factor
- HCI – (i) Human-Computer Interaction/Interface
- HCSC – (i) Higher Command and Staff Course
- HCT – (i) Higher Colleges of Technology, tertiary education institution in the United Arab Emirates (UAE)
HD
- HD
- (i) Henry Draper (star catalogue)
- Hull-Down (armored vehicle target, as opposed to Fully Exposed)
- High Definition
- Huntington's Disease
- HDD
- HDL – (i) High-Density Lipoprotein
- HDM – (i) Human Decision-Making
- HDMI - High Definition Multimedia Interface
- HDR
- (i) Hard disk recorder
- Henningson, Durham & Richardson (founders of the engineering and construction firm now known by their initials)
- High dynamic range, a term used in both digital imaging and 3D rendering
- Hot Dry Rock (experimental geothermal technology)
- Human Development Report (UN publication)
- HDRA – (i) Henry Doubleday Research Association
- HDTV – (p) High-Definition Television
HE
- he – (s) Hebrew language (ISO 639-1 code)
- He – (s) Helium
- HE – (a) High Explosive
- HEAT – (a) High Explosive Anti-Tank (ammunition)
- heb – (s) Hebrew language (ISO 639-2 code)
- HEBA – (p) Hellenic Basketball Clubs Association
- HEER – (a) High-Explosive Extended Range (ammunition)
- HEIC – (i) Honourable East India Company
- HELOC – (a) Home equity line of credit
- HEMP – (a) High-Altitude Electromagnetic Pulse
- HEO
- HEOSS – (a) High Earth Orbit Space Surveillance
- HEP – (i) High-Explosive Plastic (ammunition)
- HEPA – (a/i) High-Efficiency Particulate Air (filter)
- her – (s) Herero language (ISO 639-2 code)
- HESH – (a) High-Explosive, Squash-Head (ammunition)
- HESV – (i) Heavy Engineering Support Vehicle
- HETT – (a) Heavy Equipment Transporting Truck / Heavy Equipment Truck Tractor
- HEU – (i) Highly Enriched Uranium
- Hewitts – (a) Hills in England, Wales and Ireland over Two Thousand feet (with topographic prominence of at least 30 m)
HF
- Hf – (s) Hafnium
- HF – (i) High Frequency
- HFAC – (p) Human Factors ("aytchfak")
- HFE – (i) Human Fertilisation and Embryology (UK Act)
- HFE – (s) The common-emitter current gain in a BJT transistor (also represented by βF). See: BJT
- HFEA – (i) Human Fertilisation and Embryology Authority (UK)
HG
- Hg – (i) Mercury (Latin Hydrargyrum)
- HGC – (i) UK Human Genetics Commission
- HGF – (i) Human Growth Factor
- HGTV – (i) Home & Garden Television
HH
- HHD – (p) humanitatum doctor (Latin, "doctor of humanities")
- HHB - Ha Ha Bonk – The noise made when you laugh your head off. Used instead of LOL...
HI
- hi – (s) Hindi language (ISO 639-1 code)
- HI – (s) Hawaii (postal symbol)
- Hierarchical Ingredient Code, a system of classifying drug ingredients
- HIDACZ – (p) High-Density Airspace Control Zone ("high dak zed/zee")
- HIH – (i) His (or Her) Imperial Highness
- HIM – (i) His (or Her) Imperial Majesty
- HIMAD – (p) High to Medium Altitude Air Defence (see also H/MAD)
- HIMEZ – (a) High Altitude Missile Engagement Zone
- HIMYM - How I Met Your Mother
- hin – (s) Hindi language (ISO 639-2 code)
- HIPAA – (i) U.S. Health Insurance Portability and Accountability Act
- Hipparcos – (p) HIgh Precision Parallax COllecting Satellite
- Hird – (a) Hurd of interfaces representing depth (cf. HURD)
- HiRISE – (p) High Resolution Imaging Science Experiment
- HIT – (a) Health Information Technology
- HIV – (i) Human Immunodeficiency Virus
- HIWT – (i) Hobart Institute of Welding Technology
HJ
- HJ – (i) hic jacet (Latin, "here lies")
- HJD – (i) Heliocentric Julian Day
HK
- HK – (s) Hong Kong (ISO 3166 digram; FIPS 10-4 territory code)
- HKD – (s) Hong Kong dollar (ISO 4217 currency code)
- HKG – (s) Hong Kong (ISO 3166 trigram)
- HKMAO – (i) Hong Kong and Macau Affairs Office
- HKO – (i) Hong Kong Observatory
- HKS – (i) HyperKinetic Syndrome
- HKSAR – (i) Hong Kong Special Administrative Region of the People's Republic of China
HL
- hL – (s) Hectolitre
- HL – (i) Holding Line
- HLA – (i) High Level Architecture (simulation) – Human Leukocyte Antigen
- HLL – (i) High-Level Language
- HLN – (i) Headline News
- HLOS – (i) High Level Output Specification
- HLS – (i) hoc loco situs (Latin, "laid in this place")
- HLVW – (i) Heavy Logistics Vehicle, Wheeled
HM
- HM – (s) Heard Island and McDonald Islands (ISO 3166 digram; FIPS 10-4 territory code)
- H/MAD – (p) High/Medium Altitude Air Defence ("aytchmad"; see also HIMAD)
- HMCE – (i) Her/His Majesty's Customs and Excise (former UK government department; succeeded by HM Revenue and Customs)
- HMCS
- (i) Her/His Majesty's Canadian Ship
- Her Majesty's Courts Service (former UK agency; succeeded by Her Majesty's Courts and Tribunals Service)
- HMD – (s) Heard and McDonald Islands (ISO 3166 trigram)
- HMF – (p) HydroxyMethyl Furfural
- HMM – (i) Hidden Markov model
- HMMWV – (i) High Mobility Multipurpose Wheeled Vehicle ("hum-vee"; "hummer")
- hmo – (s) Hiri Motu language (ISO 639-2 code)
- HMO – (i) Health maintenance organization
- HMP – (i) Her Majesty's Prison
- HMRC – (i) Her/His Majesty's Revenue and Customs
- HMS
- (i) Helmet-mounted display
- Her/His Majesty's Ship (Royal Navy)
- HMSO – (i) Her Majesty's Stationery Office
- HMV – (i) His Master's Voice
HN
HO
- ho – (s) Hiri Motu language (ISO 639-1 code)
- Ho – (s) Holmium
- HO – (s) Honduras (FIPS 10-4 country code)
- HOLLAND – (a) Hope Our Love Lasts And Never Dies
- HOMES – the Great Lakes; Huron, Ontario, Michigan, Erie, Superior
- HONY – Humans of New York, a photoblog.
- HOPI – (a) Hybrid Optical and Packet Infrastructure (see Internet2, Abilene Network)
- HoReCa – (a) Hotel, Restaurant and Catering
- HORIZON – (p) Hélicoptère d'observation radar et d'investigation sur zone (French, Zone Investigation and Radar Observation Helicopter)
- HOSTAC – (a) Helicopter Operations from Ships Other Than Aircraft Carriers
- HOT – (a) Highly Optimised Tolerance
- HOTAS – (a) Hands on throttle-and-stick
- HOTT or HotT – (i) Hordes of the Things (miniature fantasy wargaming rules; a play on The Lord of the Rings)
- HOV – (i) High Occupancy Vehicle
HP
- hp – (s) horse power
- HP – (i) Hewlett-Packard – Hindustan Petroleum – (s) Himachal Pradesh (Indian state code)
- HPA – (i) UK Health Protection Agency
- HPCL – (i) Hindustan Petroleum Corporation Limited
- HPGL or HP-GL – (i) Hewlett-Packard Graphics Language
- HP-IB – (i) Hewlett-Packard Instrument/Interface Bus (first implementation of GP-IB, later standardised and now known as IEEE-488)
- HP-IL – (i) Hewlett-Packard Interface Loop (serial bus used with some HP calculators and computers, notably the HP-41 and HP-71 series)
- HPLC – (i) High Performance Liquid Chromatography
- HPMOR – (i) Harry Potter and the Methods of Rationality (work of Harry Potter fan fiction)
- HPT – (i) High[er] Payoff Target
- HPV – (i) Human Papilloma Virus
HQ
- HQ – (i) Headquarters – (s) Howland Island (FIPS 10-4 territory code)
- HQ – (i) High Quality
- HQDA – (i) Headquarters, Department of the Army
HR
- hr – (s) Croatian language (ISO 639-1 code)
- HR
- (s) Croatia (FIPS 10-4 country code; ISO 3166 digram – from the country's native name of Hrvatska) – (s) Haryana (Indian state code)
- (i) Harvard Revised star catalogue
- Human Resources
- HRBL – (i) High-level Representation of Behavior Language (original name of the Herbal language)
- HRD – (i) Human Resource Development
- HRED – (i) (U.S. Army Research Laboratory's) Human Research and Engineering Directorate (Aberdeen Proving Ground, Maryland)
- HRF – (i) High Readiness Forces
- HRH – (i) His (or Her) Royal Highness
- HRK – (s) Croatian kuna (ISO 4217 currency code)
- HRM – (i) His (or Her) Royal Majesty
- HRM – (i) Human Resource Management
- HRT – (i) Hormone Replacement Therapy
- hrv – (s) Croatian language (ISO 639-2 code)
- HRV
- (s) Croatia (ISO 3166 trigram)
- (i) High Resolution Visible
HS
- Hs – (s) Hassium
- HSA – A health savings account available to taxpayers in the United States.
- HSBC – (i) The Hong Kong and Shanghai Banking Corporation
- HSC – (i) Higher School Certificate
- HSM – (i) High School Musical
- HSMAD – (i) Human Science/Modeling and Analysis Data
- HSN – (i) Home Shopping Network
- HSPH – (i) Harvard School of Public Health
- HSS
- (i) Health Service Support
- (i) High-Speed Steel
- HSSI – (i) High-Speed Serial Interface
- HST – see entry
- HSV
- (i) Herpes Simplex Virus
- Hue Saturation Value (colour model)
HT
- ht – (s) Haitian Creole language (ISO 639-1 code)
- HT
- (s) Haiti (ISO 3166 digram)
- (i) High Temperature
- hoc tempore (Latin, "at this time")
- hoc titulo (Latin, "under this title")
- HTA – (i) HyperText Application
- HTC
- High Tech Computer Corporation, original name of the company now known simply as HTC
- Horry Telephone Cooperative
- HTFU – (a) Harden The Fuck Up
- HTG – (s) Haitian gourde (ISO 4217 currency code)
- HTH – (a) Hope That Helps
- HTI – (s) Haiti (ISO 3166 trigram)
- HTML – (i) HyperText Markup Language
- HTS – (i) High-Temperature Superconducting wire
- HTTP – (i) HyperText Transfer Protocol
HU
- hu- (s) Hungarian language (ISO 639-1 code)
- HU – (s) Hungary (ISO 3166 digram; FIPS 10-4 country code)
- HUD – (i/a) Head-Up Display – Housing and Urban Development
- HUF – (s) Hungarian forint (ISO 4217 currency code)
- HUHA – (a) Head up his/her ass (Marine salute; probably a backcronym)
- HUMINT – (p) Human Intelligence (military parlance)
- Hum-Vee – See HMMWV
- hun – (s) Hungarian language (ISO 639-2 code)
- HUN – (s) Hungary (ISO 3166 trigram)
- HURD – (a) Hird of Unix-Replacing Daemons (cf. Hird)
- HVU – (i) High Value Unit (military)
HV
- HV – (s) Upper Volta (ISO 3166 digram; obsolete 1984)
- HVAC – (s) Heating, ventilation and air conditioning Used in architecture, business and marketing; refers to a building's entire system of heating, moving, or cooling air.
- HVAP – (i) High Velocity Armour Piercing (ammunition)
- HVHF – (i)High velocity human factors
- HVM – (i) High Velocity Missile
- HVO – (s) Upper Volta (ISO 3166 trigram; obsolete 1984)
- HVP – (i) HarborView Properties – High vacuum process – Hydrolyzed vegetable protein – Human Variome Project – High Velocity Protection – H.V.P. (rapper) – High Voltage Protection – High Vapor Pressure – Hub Voice Processor – High-Velocity Projectile – High-Video Pass – High-Velocity Particle
HW
HX
- HX – (s) IATA code of Hong Kong Airlines - (s) Medical history - (s) Hydrogen halide - (s) Concept automobile by HUMMER
- HXB – (s) The glycoprotein Tenascian C
HY
- hy – (s) Armenian language (ISO 639-1 code)
- hye – (s) Armenian language (ISO 639-2 code)
- HYP
- (i) Halkın Yükselişi Partisi (Turkish: "People's Ascent Party"), a political party in Turkey
- Harvard, Yale, Princeton (perennially at or near the top of American university rankings)
- HYS – (i) Harvard, Yale, Stanford (perennially named as the top three law schools in the U.S.)
HZ
- hz – (s) Herero language (ISO 639-1 code)
- Hz – (s) Hertz
- HZ – (s) Haze (METAR Code)
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