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COMPONENTS OF COMPUTER


INPUT DEVICE

 

Keyboard Mouse Scanner Output Device Storage Device Quiz
Scanner

  • A scanner is used to transfer text or photos (illustrations) to the computer.

     

  • like a photocopier it scans a full page with laser light but instead of printing copies, it transmits the image and text to the computer as digital code, which can be saved as a file.

     

  • In effect, it performs the exact opposite function to a printer by converting a printed page into a computer file.

     

  • There are also hand held scanners which can be wiped over the page but they have to be used very slowly and carefully for good results.

  • Can alter or enhance the image, print it out or use it on your Web page.

     

  • Scanners are usually connected to the computer's parallel or USB port.