UPC (Universal Product Code) is used in the United States and Canada. It is a subset of EAN (European Article Number). (E) stands for Version E. It is also called a zero-suppression symbol since its manufacturer identification number and item code consist of only six (6) digits after removing zeroes. The system character is always zero (0) normally. Bar Code Pro(r) also supports system character one (1) which is reserved by UCC. The input Bar Code Pro(r) takes may be the original eleven (11) digits or the zero-suppressed six (6) digits. Two or five digits may be added as a supplemental number to the second text edit field. The human-readable characters are suggested to be printed in OCR-B type face.

UPC (E) 6-Digit Input supposes the system character be 0. It takes an 6-digit input.