| http://www.w3.org/ns/prov#value | - BACKGROUND OF THE INVENTIONSolid-state imaging readers have been used in supermarkets, warehouse clubs, department stores, and other kinds of retailers to electro-optically read one-dimensional bar code symbols, particularly of the Universal Product Code (UPC) type, on products to be purchased, each symbol having a row of bars and spaces spaced apart along one direction, and also for processing tw
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