Bar codes are used to keep track of the things you sell and to keep track of when you need to restock certain items, so they are available for customers if they want to buy it.
Because bar code technology is so accurate, staff will be able to tell what stock they have and if anything is missing or has been stolen.
The main types of bar code scanners are:
There are two main bar code types, linear and 2D. Linear bar codes are made up of linear lines and a 12 digit number. The first 6 numbers is the manufacturer's identification number, the next five represent the item number. The last number is a check digit, which lets the scanner know if the item has been scanned correctly or not. They usually hold information such as text.
A 2D bar code is more complex. It can include information such as price, quantity, web address or image. A linear bar code scanner can't read a 2D bar code so an image scanner is used to scan these.