Alphabetic writing systems

An alphabet is a small set of letters — basic written symbols — each of which roughly represents or represented historically a phoneme of a spoken language. The word alphabet is derived from alpha and beta, the first two symbols of the Greek alphabet.

In a perfectly phonemic alphabet, the phonemes and letters would correspond perfectly in two directions: a writer could predict the spelling of a word given its pronunciation, and a speaker could predict the pronunciation of a word given its spelling. Each language has general rules that govern the association between letters and phonemes, but, depending on the language, these rules may or may not be consistently followed.

Perfectly phonemic alphabets are very easy to use and learn, and languages that have them (for example Serbian or Finnish) have much lower barriers to literacy than languages such as English, which has a very complex and irregular spelling system. As languages often evolve independently of their writing systems, and writing systems have been borrowed for languages they were not designed for, the degree to which letters of an alphabet correspond to phonemes of a language varies greatly from one language to another and even within a single language. In modern times, when linguists invent a writing system for a language that didn't previously have one, the goal is usually to develop a phonemic alphabet. It should be noted that a truly phonetic alphabet for a natural spoken language would be very cumbersome, as it would have to a huge variety of phonetic variation. An example of such a writing system is the International Phonetic Alphabet (IPA).