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Input and output devices in retailing

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James Hayman

on 19 November 2012

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Transcript of Input and output devices in retailing

Input and output devices in retailing businesses Let's start with: Input devices The barcode scanner is the main input device of a supermarket. It works by scanning the codes on the products and using a database on the supermarket computer it identifies the product and finds the price. Barcode scanners make shopping much quicker as before supermarkets were required to find the information for all the items in their database/list manually. But what happens when the barcode scanner doesn't work!?? What if the barcode has been scratched off/fallen off the product? How does the cashier find the information in the database? Luckily, the cashier can use a keyboard to type in the codes of the product into the computer. When the keys on a keyboard are pressed, an electrical current is sent to the computer's processor which reads it and displays it on the computer screen. This is slower than using a barcode scanner as a cashier has to read all the code and type it in themselves but is much faster than having to find the information through a list. Next is the magnetic stripe reader. This is used to read magnetic strips on credit cards using infra-red. This processes this information onto the computer so the money can be deducted from the persons bank account and pay for the products. This is alot easier for both the person and the cashier as the person doesnt need to bring all his bank notes and coins and the cashier doesnt need to waste time getting the right change and filing all the money. The sliding doors at the front of a supermarket use a sensor which detects body heat and sends a signal to the computer which opens the doors. Finally on input devices is the CCTV cameras. These are used to keep track of what's going on in the supermarket. The camera records activity and sends the information through a cable to the monitors in the control room. That's enough about input devices.
But we're not done yet....
Don't worry, there aren't too many. The computer screens at the checkout counter which display the supermarket databases are output devices.
A computer uses a video card which sends signals to the computer screen which allows it to display what is being used on the computer. Cash registers are able to print out your receipt making them an output device aswell as an input device (keyboard, barcode scanner). The information that is needed to be printed out is sent to the "printer" and the printer uses ink to write the information and it comes out as a receipt which we can read. That should be it. Hope this information was good and hope it was all correct. Thank you for reading this and have a good day :D
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