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Code 93 is an alphanumeric, variable length symbology developed and maintained
by Intermec Corporation.
It combines some of the characteristics of Code 39 and Code 128 into a
single bar code language. As with Code 128, each Code 93 character is made
up of three bars and three spaces, each of which can be single, double,
triple, or quadruple thickness. Also, as with Code 128, Code 93 can represent
the entire 128-character ASCII set. However, whereas Code 128 represents most
of the 128 characters with separate, unique characters, Code 93 employs the
same 43-character base set as Code 39, and uses two-character combinations
represent the rest of the 128-character set. Code 128 is a more versatile
and efficient bar code language than Code 93, especially when representing
numbers.
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