Saturday, 9 April 2011

b)What is input and input devices?


Input
Whenever you enter data into your computer, it is referred to as input. This can be text typed in a word processing document, keywords entered in a search engine's search box, or data entered into a spreadsheet. Input can be something as simple as moving the mouse or clicking the mouse button or it can be as complex as scanning a document or downloading photos from a digital camera.
Input devices
An input device is any device that provides input to a computer. There are dozens of possible input devices, but the two most common ones are a keyboard and mouse. Every key you press on the keyboard and every movement or click you make with the mouse sends a specific input signal to the computer. These commands allow you to open programs, type messages, drag objects, and perform many other functions on your computer.

                                                                                  
           Keyboard


       Scanner 


        Microphone

          Mouse
  
         Logitech wireless trackball

        Touch screen 

         Digital video camera



               Webcam

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