Barcode uses

Barcodes are unquie and allow access to specific data in a database. In a supermarket information about price and stock are stored in a database. The barcode will allow them to access this data and perform automated stock control. For every product bought they can keep accurate records allowing them to reorder stock when needed.

Warehouses use barcodes to keep track of deliveries. When a parcel arrives at a warehouse it will be scanned and its location noted in a database. Online parcel tracking uses this to let you know when a parcel is out for delivery. It also used for when new stock arrives.

Barcodes can be used to read data from a database or update a database.