A (letter)

A is the first letter of the Latin alphabet, the writing system used for Somali and many other languages. It is typically written in two forms: uppercase (A) and lowercase (a). In most languages this letter represents a vowel—a sound produced without obstruction of airflow.

In written Somali using the Latin script, A is one of five basic vowels: a, e, i, o, u. A distinction is made between the short vowel (a) and the long vowel (aa), which can change a word's meaning. For example, 'bad' and 'baad' differ in this way. The doubling of the letter is therefore part of the writing system's structure, not merely ornamental.

History of the letter

The origin of the letter A is traced to a Semitic symbol called 'alef', which originally represented an ox or ox head. The Phoenicians passed this symbol to the Greeks, who modified it to represent a vowel and named it 'alpha'. Latin later adopted it from Greek (and Etruscan), and it gradually became the form known today. Similarly, the Arabic letter 'alif' and the Hebrew letter 'alef' share this common origin.

Sound

The sound represented by the letter A varies from language to language. In Somali, Spanish, and Italian it typically represents an open central vowel. English, by contrast, uses this letter to represent several different sounds depending on its position in a word and sound changes, as seen in the differences among 'cat', 'father', and 'name'. Some languages use additional marks (such as á, à, â, ä, å) to indicate different vowel qualities or lengths.

Use as a symbol

The letter A is used as a symbol in many contexts. In mathematics and science it denotes a variable or geometric point. In some educational grading systems, A represents the highest grade. In music, A is one of the names of the basic notes and is used in tuning instruments. In lists and sequences, A typically marks the first item.