|Code 93 barcode was designed to improve upon code 39. It is an alphanumeric, variable length symbology. Code 93 is used primarily by Canada post to encode supplementary delivery information. Code 93 is a more compact version of Code 39. Code 93 offers higher information density for alphanumeric data than either Code 39 or Code 128. It encodes exactly the same characters as Code 39, but uses 9 barcode elements per character instead of 15. The Modulus 43 checksum is optional, just as with Code 39. Every symbol includes two check characters.