The barcode you see on most retail products in the U.S. and Canada is known as a UPC-A, for universal product code, and the number comprises 12 digits. According to Geeky Camel, the first digit ...

These posts explain that if the barcode starts with the number 729, 841, or 871, these products have been manufactured in Israel. Many of these posts ask their followers to avoid buying any of ...

Barcodes contain a checksum – an ingenious use of mathematics that even lends itself to a fun way to surprise your friends, ...