INPUT DEVICES

DEFINITION:
• INPUT DEVICES are hardware used to translate words, sounds, images and actions that people understand into a form that the system unit can process.
• Often input devices are under direct control by human user who uses them to communicate commands or other information to be processed by the computer, which may then transmit feedback to the user through an output device. The common input devices include
• keyboard
• mouse etc.


TYPES OF INPUT DEVICES:
• Typing input devices
• Pointing input devices
• Direct input devices
• Audiovisual input devices.

TYPING INPUT DEVICES:
KEYBOARD
• The main input device for most computer systems is the keyboard.
• It helps you to type data and computer instructions into the computer system.
• Keyboards convert numbers, letters ,and special characters that people understand into electrical signals.
• Most standard keyboards have four basic components
– A typing keypad
– function keys
– a numeric keypad
– and editing keys.

POINTING DEVICE:
MOUSE:
• Another type of input device is a pointing device.
• The most common pointing device is a mouse.
• The mouse allows you to control more easily a pointer on the screen, rather than just using the arrow keys on the keyboard.
• The mouse is also used to select command options and to control information displayed on the monitor.

posted by:

Mansi.