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bahir eley

on 31 October 2011

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Transcript of b

Bahir Eley
Steven George This input devic is a keyboard. The keyboard is a way to input letters or numbers into different applications or programs. A keyboard also has special keys that help operate the computer. 1. keyboards have special key that proform specific functions.

2. instead of using the mouse to move the cursor you can use the arrow key situated on the keyboard to move the cursor on the monitor.

Advantage Disadvantage 1. The person using the keyboard have to learn how to type.

2. The frequent movement from keyboard to move and back could cause carpal tunnel syndrome.

This input devic is a digital camera A digital camera can be used to take pictures. It can be hooked up to a computer to transfer the pictures from the camera to the computer. Some digital cameras hold a floppy disk, and the floppy disk can be taken out of the camera and put directly into the computer. Advantage 1. Established technology

2. Simple cabling standard that uses a single BNC cable to connect the camera to the framegrabber

Disadvantage 1. Offer little flexibility in features such as image size, frame rate, and bit depth

2. No capability for programmatically changing camera settings on the fly

This input device is a computer mouse The mouse is used to open and close files, navigate web sites, and click on a lot of commands when using different applications. Advantage 1. Can be installed without any installation software Disadvantage 1. They need a flat surface to be used, or else they won't function

This input device is a scanner A scanner is used to copy pictures or other things and save them as files on the computer. Advantage 1. It can copy things onto computers then you can alter the things you copied.

2. Flatbed scanners are very accurate and can produce reasonably high quality images Any image which is digitised by the scanner can then be included on electronic documents Images once digitised can be enhanced with a graphics application

Disadvantage 1. is that if there is a blackout, the whole system goes out

2. Images can take up a lot of memory space Images lose some quality in the scanning and digitising process The quality of the final image is dependent on the quality of the original image

This input device is a compact disc. CDs store information. The CD can then be put into another computer, and the information can be opened and added or used on the second computer.
Advantage 1. cd can hold lots of media.

2.easy to carry

Disadvantage 1. easy to scratch

2.easy to brak

3. can get damaged
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