Hot and Cold Hydrotherapy-Showers. One's circulation can be given a tremendous boost by taking a shower and alternating the flow of water from hot to cold, back and forth. The result is invigorating and extremely healthful. One of the main advantages of hot and cold showers is their ease of use.ne's circulation can be given a tremendous boost by taking a shower and alternating the flow of water from hot to cold, back and forth. The result is invigorating and extremely healthful. One of the main advantages of hot and cold showers is their ease of use.
A year later, in 1974, a pack of Wrigleyâs chewing gum became the first item to be scanned with a UPC bar code. According to GS1 (Global Standards One), the agency which issues bar code numbers, there are now about 5 billion bar codes scanned every day around the world. Laurer and Woodlandâs original bar codes have spawned a whole bunch of other bar codes that are used for all kinds of things.
For example a UPC-E barcode with the number 654321 would expand to the UPC-A 065100004327 or 165100004324, depending on the parity pattern of the encoded digits, as described next. UPC-E check digits are calculated using this expanded string in the same way as used by UPC-A.he first UPC marked item ever scanned at a retail checkout was at the Marsh supermarket in Troy, Ohio at 8:01 a.m. on June 26, 1974, and was a 10-pack (50 sticks) of Wrigley's Juicy Fruit chewing gum. The shopper was Clyde Dawson and cashier Sharon Buchanan made the first UPC scan.