Alphabet
Other writing systems do not use letters, but they do (at least in part) represent sounds. For example, many systems represent syllables. In the past such writing systems were used by many cultures, but today they are almost only used by languages people speak in Asia.  A syllabary is a system of writing that is similar to an alphabet. A syllabary uses one symbol to indicate each syllable of a word, instead of one symbol for each letter of the word. For example, a syllabary would use one symbol to mean the syllable "ga", instead of two letters of the alphabet "g" and "a".