Sweeper, is a device that converts numbers into work. Through the scanning of the data will be transmitted to the computer for storage, inventory called inventory machine or data collector, it itself is a computer, the principle and your cell phone, are CPU, memory, FLASH, can also insert the memory card, in the end, the existence of which is related to the program.
Cheap is handheld, also known as the laser gun, but do not choose the red light gun, this must be scanned at close range, compared to too much trouble; fast and convenient is the platform, the price is not very expensive.
:Scanner is a machine that reads bar code information. The use of infrared light source is emitted, and then based on the results of the reflection, the chip is used to decode the code, and then finally return the correct characters represented by the barcode.