A bar code scanner scan a little label that has bar code on it.the information is then saved on the computer.It is also use in libraries alot
Digit Check
you don't you use the person for your code bar
There are numerous advantages to the use of a bar code. The primary two are speed and accuracy. A bar code reader can decipher the code in just thousandths of a second and transmit it with near perfect accuracy - much better than humans can.
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There are handheld bar code scanners, so a handheld bar code scanner is a bar code scanner, but a bar code scanner is not necessarily a handheld scanner. There are bar code scanners in store checkout stands that are fixed, and there may or may not be an associated handheld scanner there for the clerk to use to scan, say, a large bag of dog food that the customer doesn't want to hoist up onto the counter.
A company can be any size to use barcodes.
What a bar code reader is requires an understanding of the amount of information contained in the Bar code itself. Simply the amount of information is huge. All a reader will do is use a LASER beam to collect or read the bar code and transfer the information into a computer.
The use of bar code scanners exploded in the 70s as the technology quickly spread to retail outlets.
Some use bar-code scanners, some use RFD chips
Bar codes have a meaning because the meaning of a bar code is assigned to that bar code. A bar code identifies an item, and product information regarding that item is held in a data base.
The level of measurement of a bar code is nominal.