BCD

BCD

Six-bit BCD code, alphanumeric BCD, alphameric BCD, BCD Interchange Code, or BCDIC is a representation of numerals, uppercase Latin letters, and some special and control characters as a six-bit character code. Unlike later encodings such as ASCII, BCD codes were not standardized. Different computer manufacturers, and even different product lines of the same manufacturer, often had their own variants, and sometimes included unique characters.

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