1) Bars below ISBN numbers 2) Bars for checkers 3) Bars for scanning 4) Bars in stores 5) Bars in the supermarket 6) Bars on a box 7) Bars on a mars bar 8) Bars on a soap box 9) Bars on candy boxes 10) Bars on cookie boxes 11) Bars on market shelves 12) Bars on six-packs 13) Bars on Snickers bars 14) Bars read by lasers 
United Pentecostal Church
a standard machine-readable bar code used to identify products purchased in grocery and other retail stores.[3 related articles]
Universal Product Code. A bar code, using thick and thin vertical lines, which is printed on labels, packets, etc., to identify a specific product, and is used for stock control
Universal Product/Program Code + User Parameter Control
Uniform Product Code, the American standard article number.
Uniform Plumbing Code.
Uniform Probate Code
Uniform Practice Code
UPC (Universal Product Code) is a barcode symbology used for tracking trade items in stores. Will consist of two parts - numbers and a series of bars. A UPC doesn't carry any price information, just relates to the stores database allowing the user to set their own prices.