UPC-A Construction The UPC-A symbol is physically constructed as follows: Left hand guard bars, encoded 101 Number system character, encoded as a left hand character First five data characters, encoded as left hand characters Center guard pattern, encoded 01010 Last five data characters, encoded as right hand characters Check character, encoded as a right hand character Right hand guard bars, encoded 101 Nominal module bar/space width = 0.013 in (0.33 mm) Worst case module width = 0.009 in. (0.23 mm) The bars represent binary ones (1), while the spaces represent binary zeroes (0). The characters on the left hand side of the symbol always have odd parity, so the number of modules that are bars are always odd, while the parity of the right hand side of the tag always have even parity, and the number of modules that are bars on the right hand side of the tag is always even. The following is the table for the character patterns, for both the left hand and right hand characters. UPC A Character Set Left Hand Decimal Right Hand Character Number Character\fN 0001101 0 1110010 0011001 1 1100110 0010011 2 1101100 0111101 3 1000010 0100011 4 1011100 0110001 5 1001110 0101111 6 1010000 0111011 7 1000100 0110111 8 1001000 0001011 9 1110100No se alguien me puede ayudar o si sabe de algun fonto para Upc muy agradecido.