input-output-and storage devices ppt
TRANSCRIPT
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Input, Output and Storage Devices
Ms. Hall
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Input is any (unprocessed material)
data and instructions entered
into the memory of the computer.
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An input device is any hardware component that allows users to enter data and instructions, programs, commands and user
response into a computer.
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The mouse is an input device designed to manipulate objects on the computer screen.
It can also be described as (a hand-operated electronic device that controls the coordinates
of a cursor on your computer screen as you move it around on a mouse pad; on the
bottom of the device is a ball that rolls on the surface of the mouse pad).
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The keyboard is an
input device
designed to enter
text, characters and
other commands
into the computer.
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This is a pointing device shaped like a pen and is connected to a VDU (Visual Display Unit). The tip of the light pen contains a light-sensitive element which, when placed against the screen, detects the light from the screen enabling the computer to identify the location of the pen on the screen.
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This is often used for playing games and for simulators. They can move in 8 directions and often have buttons attached for extra functionality.
WHAT IS A WHAT IS A JOYSTICK
??
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A scanner takes a picture placed on
the scanner screen and digitizes the
information in order to present it on the computer
screen for viewing.
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Output:
This is processed data called information
because it is now organized material for
users to view and manipulate.
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Storage:
Storage is keeping information or data that
will not be needed for over a long period of
time using a storage media.
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Backing storage devices are where you can store data permanently. This means that data is held when the computer is switched off and can be loaded onto a computer system when required.
The hardware that stores the data is called backing storage media. The media are put into backing storage devices.
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Monitor: This is a plastic or metal case that houses a display device that conveys text or graphics as a separate peripheral.
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Plotter: This is a special purpose output device that draws graphs, charts, and maps using ink pens.
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Speaker: This is a component of a computer that produces music, speech, or other sounds, such as beeps.
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Multimedia projectors: This is a device that takes the image from a computer screen and projects it onto a larger screen so an audience of people can see the image clearly.
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Hard Disk Compact Disk(CD)
Digital Video Display (DVD)
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Flash drive Zip Disk
Floppy Diskette
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