UPC-A (Universal Product Code version A) is the most common and well-known symbology in the United States. You can find it on virtually every consumer goods in your local supermarket, as well as books, magazines, and newspapers. There may be 2-digit or 5-digit Supplement to UPC.

Structure of an UPC-A number
An UPC-A number consists of four areas:
(1) The number System (one digit);
(2)The manufacturer code (five digits);
(3) the product code (five digits);
(4)The check digit (one digit).

UPC-A Properties
Besides the properties to general barcode, the following property belongs to UPC-A:
SupplementarySeparation gets or sets the space between the end of barcode and the begin of supplementary for UPC/EAN in Inches. Default is 0.2 inches.

UPC-A Check Sum
UPC-A check digit is calculated using standard Mod10 method.

ezBarcode UPC-A Acceptable String Length
ezBarcode UPC-A can accept 11, 12, 13, 14, 16, 17 digit length.

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