Using Bar-code in business transactions.

The use of bar-code in business started in nineteenth century, and has now expanded to almost all products and items. In supermarkets the use of bar-code on all products is crucial, without it the information on the products such as the price and how many of a particular product was sold, it had to be checked manually. Workers had to physically checked all items to determine in the inventory how many products needs to be restocked. Cashing for items would take much longer because the price of an item when being bought must be punched manually on the cash register or calculator. Now with a scanner at the cash register to read the bar-code on a product when it is being sold makes cashing and keeping a record or an inventory much easier and simpler.

Unlike (RFID) Radio Frequency Identification, Bar-codes cannot be read from long distances to get information on the product. It cannot also be tracked because it does not have a receiver. Bar-codes are now being used in most stores where purchasing is being done.

Bar-code Technology have expanded to uses in the library to monitor books that are borrowed and keep an inventory of what books are in the library. It is now also being used to monitor logging of trees and to prevent illegal logging. With use of a smartphone bar-codes can be scanned from the phone and all the information on the item retrieved.