A bar code reader is a device used to read bar codes. It typically consists of a WAND or SCANNER that reads the bar code and then sends the information to a computer. The WAND is a handheld device that is waved over the bar code, while the SCANNER is a stationary device that reads the bar code when it is placed in front of it. Both devices are used to read the bar code and send the information to a computer for processing.