Topic:
Input and Output
Devices
Do you ever notice how information gets into your computer and how comes out in a form you can use? It is possible with the help of I/O devices...
(1)Input Devices:
Def; An Electronic device that can be used to enter data and Instructions into a Computer...
(a)Keyboard
A keyboard is a human interface device that is prepared as a layout of a button or keys...It has features As
Typewriter keyboard with numeric keypad
Special purpose keys
Toggle and combination keys
(b)Mouse
It is an input device. it is a pointing device used to select various options.
The mouse can be used to control and manipulate cursor movement on the monitor.
(c)Joystick
The joystick is a pointing device mostly used for playing games.
This is used to control the actions in a computer game
It consists of a lever used to move the pointer on the screen and buttons used to select options.
(d)Scanners
Scanners can be used to copy the image or text on paper into a digital format that can be used.
(e)Bar code reader
A bar code reader is an electronic device that is used for reading printed barcodes. This device directs a light beam across The Bar Code while it measures.
(f)Microphones
These record the analog sound and convert it into digital form for further processing.
(g)Digital camera
It can be used to entering full-motion recording into a computer.
(2)Output Devices
Output devices can be used to receive information from the Computer.
(a)Monitor
Def; A monitor is a peripheral device which displays computer output on a screen,
(b)Printers
Def: A Printer is a peripheral device that used to produce a hard copy or permanent record of the computer’s output.
There are two types of Printers
(1)Impact Printers
(2)Non-Impact Printers
(d)Plotters
Def: A Plotter is an output device that used to produce high-quality graphics in a variety of colors...
There two types of plotter
(1)Flatbed Plotter
(2)Drum Plotter
(d)Audio output devices
Def: Audio Output Devices can be used to translates audio information from the computer into sounds that people can understand.
Common Audio Output devices
(1)Speakers
(2)Headphones
(e)Projector
Def: Projector can be used to displays computer information on a big screen...
It is used for showing photographic slides...
These mostly used in educational and other institutional settings.
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