(Uniform Product Code)
It can only represent numbers. There are five versions A, B, C, D, and E. Version A-12 digit version E-7 digits. The last digit is a check digit. The size is 1.5 "wide and 1" high, and the background must match Clarity is mainly used in the United States and Canada for industrial, pharmaceutical, warehouse and other sectors. When UPC is decoded as twelve digits, the definition is as follows: first digit = digital identification (has been established by UCC (Uniform Code Committee)). Digits 2-6 = manufacturer's identification number (including the first digit) 7-11 = 12th digit of the unique manufacturer's product code = used for error detection
Code 3 of 9
Can represent letters, numbers and some other symbols with a total of 43 characters: A -Z, 0-9,-. $ / +%, Pac The length of the barcode can be changed, usually using "*" as the start and stop characters The check code does not need a code density between 3-9.4 characters per inch, and the blank area is 10 times the narrow bar. It is used for industrial, book, and ticket automation management.
Represents high-density data. The string is variable in length. The symbol contains a check code. There are three different versions: A, B, and C. 128 characters can be used in A, B, or C. Industrial, warehouse, retail and wholesale.