Greek Braille

Modern Greek Braille runs as follows:[1]

Letters

Basic print alphabet

α	β	γ	δ	ε	ζ	η	θ	ι	κ	λ	μ
ν	ξ	ο	π	ρ	σ	τ	υ	φ	χ	ψ	ω

Letters for print digraphs

αι	ει	οι	υι	αυ	ευ	ηυ	ου

Punctuation and formatting

.	,	'	; ?	:	-
Parenthesis		Open quote	Close quote	Capital	Accent

The accent mark (acute accent) comes before the vowel or diphthong, but after the capitalization sign: ⠐⠁ ά, ⠨⠐⠁ Ά, ⠐⠣ αί. It's not used for diaeresis; ϊ is just ⠊.

Numbers

Digits are the same as in English Braille. Arithmetical symbols are:

+	−	*	/	=

International letter assignments differ somewhat from those above. In Modern Greek Braille, for example, the letter omega (ω) is written the same as Latin j, whereas in English or French braille texts it is written as a w, which it resembles in print. Similarly, Modern Greek upsilon is written as Latin y, but in international Greek it's written as u, and the letter eta is inverted.

This alphabet is used, for example, in mathematical notation in an otherwise Latin-braille text. It also forms the basis for Greek letters in the Nemeth Braille and Gardner–Salinas braille codes. It is not used in Greece or Cyprus.[2] In the table below, the letters which differ from Modern Greek Braille are highlighted.

Greek letters found in English Braille text

α	β	γ	δ	ε	ζ	η	θ	ι	κ	λ	μ
ν	ξ	ο	π	ρ	σ	τ	υ	φ	χ	ψ	ω

The Modern Greek diphthongs are not used. In addition, there are assignments for obsolete letters used in Greek numerals:

Obsolete letters[2][3]

ϛ[4]	ϡ[4]	ϝ	ϙ/ϟ

Polytonic

International Greek braille does, however, represent the polytonic vowels of ancient forms of the language, either as a separate accent mark with the normal vowel signs, or as a single braille cell for vowel+accent. Polytonic vowels sharing a braille pattern with obsolete letters are highlighted in the table.

Polytonic letters[2]

	Accent	α	ε	η	ι	ο	υ	ω
Acute ´ (oxia)
Circumflex ῀ (perispomeni)			-			-
Grave ` (varia)

A sample of Moon type in various languages including Greek.

• Moon type is a simplification of the Latin alphabet for embossing. An adaptation for Greek-reading blind people has been proposed.