Code 93 is a variable length bar code that encodes 47 characters. It is named Code 93 because every character is constructed from nine elements arranged into three bars with their adjacent spaces. Code 93 is a compressed version of Code 39 and was designed to complement Code 39.

Code 93 supports the following characters:

• 26 uppercase letters

• Ten digits

• Seven special characters (- . $ / + % and a space)

• Four special precedence characters
  

  
  
  

• Start/stop character ( •)

A Code 93 bar code consists of the following elements:

• Leading quiet zone

• Start character

• Data characters

• First check character (referred to as C)

• Second check character (referred to as K)

• Stop character

• Termination bar

• Trailing quiet zone

An example of a Code 93 bar code is shown below: