A written or pictorial symbol intended to represent a whole word. Writing systems that make use of logograms include Chinese, Egyptian hieroglyphic writing, and early cuneiform writing systems. No known writing system is totally logographic; all such systems have both logograms and symbols representing particular sounds or syllables. A logogram represents a frequently recurring word or phrase, differing from a determinative in that it furnishes additional information instead of classifying information already given. Many scripts contain a class of logograms, such as $, =, +, and numeric signs in English. Abbreviations, though composed of phonograms, are logographic in function.