A
Overview
 
A is the first letter
Letter (alphabet)
A letter is a grapheme in an alphabetic system of writing, such as the Greek alphabet and its descendants. Letters compose phonemes and each phoneme represents a phone in the spoken form of the language....

 and a vowel
Vowel
In phonetics, a vowel is a sound in spoken language, such as English ah! or oh! , pronounced with an open vocal tract so that there is no build-up of air pressure at any point above the glottis. This contrasts with consonants, such as English sh! , where there is a constriction or closure at some...

 in the basic modern Latin alphabet
Basic modern Latin alphabet
The International Organization for Standardization basic Latin alphabet consists of the following 26 letters:By the 1960s it became apparent to the computer and telecommunications industries in the First World that a non-proprietary method of encoding characters was needed...

. It is similar to the Ancient Greek letter Alpha
Alpha
Alpha is the first letter of the Greek alphabet. Alpha or ALPHA may also refer to:-Science:*Alpha , the highest ranking individuals in a community of social animals...

, from which it derives.
The earliest certain ancestor of "A" is aleph
Aleph
* Aleph or Alef is the first letter of the Semitic abjads descended from Proto-Canaanite, Arabic alphabet, Phoenician alphabet, Hebrew alphabet, Syriac alphabet-People:*Aleph , an Italo disco artist and alias of Dave Rodgers...

 (also called 'aleph), the first letter of the Phoenician alphabet
Phoenician alphabet
The Phoenician alphabet, called by convention the Proto-Canaanite alphabet for inscriptions older than around 1050 BC, was a non-pictographic consonantal alphabet, or abjad. It was used for the writing of Phoenician, a Northern Semitic language, used by the civilization of Phoenicia...

 (which, by consisting entirely of consonant
Consonant
In articulatory phonetics, a consonant is a speech sound that is articulated with complete or partial closure of the vocal tract. Examples are , pronounced with the lips; , pronounced with the front of the tongue; , pronounced with the back of the tongue; , pronounced in the throat; and ,...

s, is an abjad
Abjad
An abjad is a type of writing system in which each symbol always or usually stands for a consonant; the reader must supply the appropriate vowel....

 rather than a true alphabet
Alphabet
An alphabet is a standard set of letters—basic written symbols or graphemes—each of which represents a phoneme in a spoken language, either as it exists now or as it was in the past. There are other systems, such as logographies, in which each character represents a word, morpheme, or semantic...

). In turn, the origin of aleph may have been a pictogram
Pictogram
A pictograph, also called pictogram or pictogramme is an ideogram that conveys its meaning through its pictorial resemblance to a physical object. Pictographs are often used in writing and graphic systems in which the characters are to considerable extent pictorial in appearance.Pictography is a...

 of an ox
Ox
An ox , also known as a bullock in Australia, New Zealand and India, is a bovine trained as a draft animal. Oxen are commonly castrated adult male cattle; castration makes the animals more tractable...

 head in Egyptian hieroglyphs.

In 1600 B.C., the Phoenician alphabet
Phoenician alphabet
The Phoenician alphabet, called by convention the Proto-Canaanite alphabet for inscriptions older than around 1050 BC, was a non-pictographic consonantal alphabet, or abjad. It was used for the writing of Phoenician, a Northern Semitic language, used by the civilization of Phoenicia...

's letter had a linear form that served as the base for some later forms. Its name must have corresponded closely to the Hebrew
Hebrew alphabet
The Hebrew alphabet , known variously by scholars as the Jewish script, square script, block script, or more historically, the Assyrian script, is used in the writing of the Hebrew language, as well as other Jewish languages, most notably Yiddish, Ladino, and Judeo-Arabic. There have been two...

 or Arabic
Arabic alphabet
The Arabic alphabet or Arabic abjad is the Arabic script as it is codified for writing the Arabic language. It is written from right to left, in a cursive style, and includes 28 letters. Because letters usually stand for consonants, it is classified as an abjad.-Consonants:The Arabic alphabet has...

 aleph
Aleph
* Aleph or Alef is the first letter of the Semitic abjads descended from Proto-Canaanite, Arabic alphabet, Phoenician alphabet, Hebrew alphabet, Syriac alphabet-People:*Aleph , an Italo disco artist and alias of Dave Rodgers...

.

When the ancient Greeks
Ancient Greece
Ancient Greece is a civilization belonging to a period of Greek history that lasted from the Archaic period of the 8th to 6th centuries BC to the end of antiquity. Immediately following this period was the beginning of the Early Middle Ages and the Byzantine era. Included in Ancient Greece is the...

 adopted the alphabet, they had no use for the glottal stop
Glottal stop
The glottal stop, or more fully, the voiceless glottal plosive, is a type of consonantal sound used in many spoken languages. In English, the feature is represented, for example, by the hyphen in uh-oh! and by the apostrophe or [[ʻokina]] in Hawaii among those using a preservative pronunciation of...

—the first phoneme
Phoneme
In a language or dialect, a phoneme is the smallest segmental unit of sound employed to form meaningful contrasts between utterances....

 of the Phoenician pronunciation of the letter, and the sound that the letter denoted in Phoenician
Phoenician languages
Phoenician was a language originally spoken in the coastal region then called "Canaan" in Phoenician, Arabic, Hebrew, and Aramaic, "Phoenicia" in Greek and Latin, and "Pūt" in Ancient Egyptian. Phoenician is a Semitic language of the Canaanite subgroup; its closest living relative is Hebrew, to...

 and other Semitic languages
Semitic languages
The Semitic languages are a group of related languages whose living representatives are spoken by more than 270 million people across much of the Middle East, North Africa and the Horn of Africa...

—so they used an adaptation of the sign to represent the vowel /a/, and gave it the similar name of alpha
Alpha (letter)
Alpha is the first letter of the Greek alphabet. In the system of Greek numerals it has a value of 1. It was derived from the Phoenician letter Aleph...

.
 
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