ASCII ( American Standard Code for Information Interchange ) (pronounced AS-key )
A set of 128 alphanumeric and special control characters.Although now widely used to denote plain-text that is ,text without formatting and independent of any type font-ASCII is usually a dsts code now used universally in communication applications by minicomputers and personel computers to represent 128 possible character set ,the numerals 0 yo 9,punctuation marks and other non-alphanumeric characters found on a standard keyboard,plus severalcontrol codes that denote invisible characters like the carriage return and tab.ASCII is also sometimes known as TTY,denoting its legacy in the teletype industry.