CODABAR

Characteristics:

  • This symbology is used by U.S. blood banks, photo labs, libraries, and on FedEx airbills.
  • Encodes numbers and the characters –$:/.+
  • First and last symbols (the guard patterns) are one of A, B, C, or D. They are returned as part of the data string.
  • Supports variable length data content.
  • Some standards that use Codabar will define a check digit, but there is no agreed-upon standard checksum algorithm.
  • The width ratio between narrow and wide can be chosen between 1:2.25 and 1:3.


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