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is also known as NW-7, or USD-4.
The shipping industry, blood bank, and libraries use Codabar barcode a lot. It suggests the minimum width of a Codabar to be 0.0065 inches (0.165 mm), or 11 digits per inch.
Codabar encodes 10 digits, dollar sign, hyphen, period, slash, colon, plus. Codabar needs start and stop characters. Start and stop characters are mapped to A, B, C, and D.
Codabar is a self-checking barcode symbology and does NOT need a check digit.