Code 93 is a variable length symbology that is capable of encoding all 128 ASCII characters. Code 93 offers higher density than Code 39. It has the same native character set as Code 39 (43 characters), but it uses additional 4 shift characters to encode other characters. Code 93 features 2 checksum characters. Start/Stop characters are also required.

Code 93 supports special character input method. See Code 39 Full ASCII section for details on how to escape control characters.