Bucklin, Randolph E., and Sunil Gupta. "Commercial Use of UPC Scanner Data: Industry and Academic Perspectives." Marketing Science 18, no. 3 (1999): 247–273.
Move ID around until a beep confirms the barcode was read. Difficulty scanning? Cover the smaller UPC barcode and try moving ID closer and farther away from scanner. According to the Texas Lottery ...
“UPC bar codes offer another way for our users ... There are a few points that make this announcement different: 1. ScanLife can already scan 2D codes, so now this is truly an all-in-one ...