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.
The first six numbers of the barcode is the manufacturerâs identification number. The next five digits represent the itemâs number. The last number is called a check digit which enables the scanner to determine if the barcode was scanned correctly or not. A linear barcode typically holds any type of text information. In contrast, a 2D barcode is more complex and can include more information in the code: price, quantity, web address or image. A linear barcode scanner canât read a 2D barcode; requiring the use of an image scanner for reading the information embedded in a 2D barcode. Check out Waspâs âWhat is a Barcode, Anyway?â video to learn the basics of barcodes in under a minute.