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Code 39 Overview

Code 39, the first alpha-numeric symbology to be developed, is still widely used-especially in non-retail environments. It is a discrete, variable-length symbology that is suitable for encoding general purpose alphanumeric data. This type of barcode contains a self-checking mechanism, in that a single print defect cannot transpose one character into another valid character. Thanks to these features, it is the standard barcode used by the United States Department of Defense, and is also used by the Health Industry Bar Code Council (HIBCC).


Code 39 is also known as

  • ANSI/AIM Code 39
  • Uniform Symbology Specification Code 39
  • USS Code 39
  • USS 39
  • Code 3/9
  • Code 3 of 9
  • USD-3
  • Alpha39
  • Code 39 Extended
  • Code 39 Full ASCII

code 39 1D barcode bar code generator sample