input-output-and storage devices ppt

Input, Output and Storage Devices

Ms. Hall

Input is any (unprocessed material)

data and instructions entered

into the memory of the computer.

An input device is any hardware component that allows users to enter data and instructions, programs, commands and user

response into a computer. 

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). 

The keyboard is an

input device

designed to enter

text, characters and

other commands

into the computer.

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.

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

??

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.

Output:

This is processed data called information

because it is now organized material for

users to view and manipulate.

Storage:

Storage is keeping information or data that

will not be needed for over a long period of

time using a storage media.

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.

Monitor: This is a plastic or metal case that houses a display device that conveys text or graphics as a separate peripheral.

Plotter: This is a special purpose output device that draws graphs, charts, and maps using ink pens.

Speaker: This is a component of a computer that produces music, speech, or other sounds, such as beeps.

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.

Hard Disk Compact Disk(CD)

Digital Video Display (DVD)

Flash drive Zip Disk

Floppy Diskette

THE END