Introduction
Input is any data or program instructions people enter into the memory of a
computer. People have a variety of options for entering data or instructions
into a computer.
Once input is in
memory, the CPU can access it and process the input into output. There are two
types of input:
data and
instructions. Instructions can be in the form of programs, commands, and user
responses.
Input devices send data and instructions to the computers. There are many input devices but the most
common ones are the keyboard and the mouse.
This module will describe the following input devices.
- Keyboard
- Mouse
- Trackball
- Light pen
- Touch screen
- Modem
- Scanner
- Microphone
- Bar code reader
- Digital camera
- Video digitiser
- Magnetic ink character recognition (MICR)
- Magnetic strips or stripes
Storage devices can be used as
input devices.
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