For years, grocery stores, book stores and other retailers have been scanning bar codes or UPC symbols to ring up your purchases. And, over the years clerks have developed a variety of entertaining methods for getting their scanners to read the black and white bars. Smoothing out wrinkled packaging, shaking handheld scanners, and performing other jiggles and juggles should ultimately help a computer find the name and price of the item. Whew! That’s a lot of work. Back in 1994, the Japanese auto industry decided there should be a better way, so a subsidiary of Toyota developed Quick Response (QR)…
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