1963: ASCII (7-bit character-encoding standard from the American Standards Association, which became ANSI in 1969) 1963/1964: EBCDIC (developed by IBM and supporting the same alphabetic characters as ASCII, but with different code values) 1965-04-30: Ratified by ECMA as ECMA-6[6] based on work the ECMA's Technical Committee TC1 had carried out since December 1960.[6] 1972: ISO 646 (ISO 7-bit character-encoding standard, using the same alphabetic code values as ASCII, revised in second edition ISO 646:1983 and third edition ISO/IEC 646:1991 as a joint ISO/IEC standard) 1983: ITU-T Rec.