ASCII

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ASCII [Pronounced ‘Askee’; The abbreviation of, and the common term for, the American Standard Code for Information Interchange]. Also ASCII code. A set of computer codes devised in 1968 and standardized in 1982 as a means of storing and transmitting (American) English texts. The standard code covers 32 non-displayed control characters (such as ‘start of text’ and ‘carriage return’) and 96 displayed alphanumeric and other characters, every letter or other symbol having a number from 0 to 128: for example, 33 for!, 36 for $, 65 for A, 66 for B, 97 for a, and 98 for b. An ASCII keyboard contains all and only such symbols and enables them to be directly coded; ASCII files are text files set in ASCII only. The prime purpose of the code is compatibility among electronic networks, texts being composed in, or converted to, ASCII in order to be transmitted and received successfully. The system, at first used only in North America, has been rapidly adopted worldwide; however, because the standard code is inadequate for complex texts and for languages with writing conventions different from English, an Extended ASCII has been developed, containing letters with diacritical marks, some vulgar fractions, monetary symbols such as for the pound and yen, and a range of graphic symbols (255 in all). See CHARACTER SET, COMPUTING.

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