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Computer Lecture 2

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M
Moiz Barry

Input devices such as keyboards and mice allow users to input data and instructions. Keyboards typically use the QWERTY layout and contain around 100 keys. When a key is pressed, the keyboard controller detects it and sends a scan code to the computer's CPU. Mice are pointing devices used to control an on-screen pointer and issue commands via techniques like pointing, clicking, dragging, and right-clicking. Other input devices include touch screens, pens, trackballs, and trackpads.

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INPUT DEVICES ,[object Object]
 
TYPES OF INPUT DEVICES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
KEYBOARD ,[object Object],[object Object]
STANDARD KEYBOARD LAYOUT ,[object Object],[object Object]
 
HOW A KEYBOARD WORKS ,[object Object],[object Object],[object Object],[object Object]
 
WHAT IS A MOUSE? ,[object Object],[object Object]
MOUSE TECHNIQUES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
VARIANTS OF THE MOUSE ,[object Object],[object Object],[object Object]
TRACKBALLS ,[object Object],[object Object],Many styles of trackball are available.
TRACKPADS ,[object Object],[object Object],[object Object]
 
DEVICES FOR THE HAND ,[object Object],[object Object],[object Object]
The user can point, tap, draw and write on the computer’s screen with a pen.
TOUCH SCREEN
Bar code readers commonly track sales in retail stores
OUTPUT DEVICES ,[object Object],[object Object],[object Object],[object Object],[object Object]
MONITORS ,[object Object],[object Object],[object Object],[object Object]
PC PROJECTORS ,[object Object],[object Object],[object Object]
Projected Screen
SOUND SYSTEMS ,[object Object],[object Object],[object Object]
 
TYPES OF PRINTERS ,[object Object],[object Object],[object Object]
DOT MATRIX ,[object Object],[object Object],[object Object],[object Object]
 
INKJET PRINTERS ,[object Object],[object Object],[object Object]
 
 
LASER PRINTERS ,[object Object],[object Object],[object Object]
 

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Computer Lecture 2