The universal product code, or UPC, is a bar code that typically has 12 digits and is usually found on the back or bottom of perishable and non-perishable products. To claim a refund for a defective ...

Barcode technology makes real-time data collection possible. Despite the multitude of barcodes in existence today, universal product codes remain among the most useful to a small business. Because UPC ...

Barcodes work based on light reflected back to scanner optics: black does not reflect light, while the white (blank) spaces do reflect light. Because characters (alphabetic, numeric, special) are ...