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computers are part of our everyday lives. They have an effect on almost

everything you do. When you buy groceries at a supermarket,a computer

 is used with laser and barcode technology to scan the price of each item

and present a total. Barcoding items ( clothes, food, and books ) requires

a computer to generate the barcode labels and maintain the inventory.

Most television advertisements and many films use graphics produced

 by a computer. In hospitals, bedside terminals connected to the hospital’s main

computer allow doctors to type in orders for blood tests and to schedule

operations.Banks use computers to look after their customers’money. In libraries

and bookshops, computers can help you to find the book you want as quickly as possible.