The Codabar is a linear barcode symbology developed in 1972. It can be called as NW-7, USD-4, Code 2 of 7 (2 values of a bar length, 7 elements). It is frequently used in medicine (for example, blood bank forms).
Valid symbols: |
0123456789 - $ : / . + ABCD (only as start/stop symbols) |
Length: |
Variable |
Check digit: |
no |
Two bars and three spaces are used for encoding. The barcode has four different sets of start/stop characters: A, B, C, D. These characters are used only as start/stop characters and should not be appeared in the barcode.
A "Codabar" barcode. "A12345678A" is a number encoded in the barcode.