Bar codes can be of variable length and don't normally use a checksum. A few industries use an optional modulo 43 checksum. We offer both standard and human readable versions of this font. Bar Code 93 was introduced in 1982 and was designed to complement bar code 3 of 9. Generally, bar codes 3 of 9 and 93 can be mixed together and automatically read.
Bar codes can be of variable length and require a checksum.
We offer both standard and human readable versions of this font. Bar Code 128 is a high density alpha-numeric bar code. With a subset C start code you encode high density numeric data in much the same way that interleaved bar code 2 of 5 works. Bar code 128 requires a checksum. Bar codes can be of variable length, although subset C requires an even number of digits.