Oki 390 - Manual (Page 50)

ML390/391 Turbo Printer Handbook 43
You will find a list of the bar code printer commands for each emulation in appendix
C.
Here is a brief explanation of each of the available bar codes, along with a sample
printout for each one.
UPC A Bar Code
UPC (Universal Product Code) bar coding is used in the supermarket industry. UPC
A coding contains ten digits: the first five digits represent the manufacturer, the sec-
ond five digits identify the product.
UPC E
UPC E bar coding is a six-digit variation of UPC A, used for labeling small items.