ence Version (IRV) based on {ISO 646} (and

hence ASCII compatible). Documentation on these was not easily accessible making international exchange of data even between IBM mainframes a tricky task.

US EBCDIC uses more or less the same characters as ASCII, but different code points. It has non-contiguous letter sequences, some ASCII characters do not exist in EBCDIC (e.g. square brackets), and EBCDIC has some (cent sign, not sign) not in ASCII. As a consequence, the translation between ASCII and EBCDIC was never officially completely defined. Users defined one translation which resulted in a so-called de-facto EBCDIC containing all the characters of ASCII, that all ASCII-related programs use.

Some printers, telex machines, and even electronic cash registers can speak EBCDIC, but only so they can converse with IBM mainframes.

For an in-depth discussion of character code sets, and full translation tables, see Guidelines on 8-bit character codes.

A history of character codes.

Last updated: 2002-03-03

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ence Version (IRV) based on {ISO 646} (andcontaining all the characters of

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