A barcode scanner or reader is an equipment utilized to catch and read information integrated in a barcode. This device may be a handheld or permanent motionless type.There are three significant apparatus of a barcode reader. These are the scanner, the decoder and a cable. The decoder may either be seen superficially or built-in to the device. The cable attaches the reader to a computer by way of different mechanisms such as keyboard or serial port, or a wedge.