What is an alphabet
Alphabet is a form of writing signs and meanings classified as "segmental", because it has graphemes that represent phonemes (basic unit of sound) of a language, and can also be classified as phonetic writing, as it seeks to represent phonemes by a given sign .
Although the term alphabet by alpha and beta became common, the Phoenician language centuries earlier already included Alef and Bet, the first two letters. The alphabet has an order that is used, for example, for ordering in dictionaries and encyclopedias on paper, or in lists of things.
Source: Wikipedia