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Computer Systems

Computer Hardware Lesson I

Lesson Objectives By the end of the lesson you should be able to: Define input devices Describe variuos types of input devices

Computer Hardware

Input devices

Input devices are hardware components used to enter data into a computer. These devices convert data into machine readable form so as to be processed by the computer. They are classified as:

  1. Pointing devices: These are devices used to controller a pointer or cursor on the screen. Examples of pointing devices include: mouse,joystick, laptop touchpad, stylus,
  2. Keying devices: These are devices used to enter data into a computer by used a set of keys. They convert data into binary form that can easily be processed by the computer. Examples of keying devices are: keypads and keyboards
  3. Scanning devices/Scanners:This captures data from an object and converts it into binary form that can be understood by the computer for processing purposes. There are two types of scanners, that is, Optical and magnetic scanners