Codabar (NW-7)
An early self-checking barcode symbology still used in blood banking, library systems, and some FedEx applications. Codabar uses four start/stop characters (A, B, C, D) that convey additional context about the encoded data's purpose.
Codabar (NW-7)
1D Linear
Type
1D Linear
Data Length
variable
Character Set
0-9, - $ : / . +
Year
1972
Related Guides
Codabar: The Legacy Barcode in Blood Banks & Libraries
Codabar's encoding scheme, four start/stop characters (A-D), ISBT 128 successor in blood banking, and where it's still used today.
Blood Bank Barcodes: ISBT 128 & Transfusion Safety
ISBT 128 barcode standard for blood products — donation identification, component labeling, and the transition from Codabar to ISBT 128.