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COMPUTER DEVICES Input Devices Output Devices Storage DevicesProcessing Devices
COMPUTER DEVICES Input Devices
Input Devices are used for two purposes:1. Used to enter information or data. 2. Used to give instructions to the computer.
Keyboard Used to enter data into the computer by typing in words or numbers. Used to type in instructions.
Used to select objects on the computer screen.Mouse Used to select objects on the computer screen. Used to draw pictures.
Used to copy documents and images to the computer.Scanner Used to copy documents and images to the computer.
Used to record sounds into the computer.Microphone Used to record sounds into the computer.
displays or give out the results of the input.COMPUTER DEVICES Output Devices displays or give out the results of the input.
Monitor It displays what we type on the screen.It displays the result from the instructions given.
Printer It helps us to get the hard copy of the output from the monitor screen.
Speaker It allows us to listen to the music and other sounds from the computer.
Computers can store a large amount of data.COMPUTER DEVICES Computers can store a large amount of data. Storage Devices Used to store data.
It is built inside the CPU of a computer and cannot be seen outside.Hard Disk It is built inside the CPU of a computer and cannot be seen outside.
The CPU stores the work done by the computer in the hard disk.When you store data in the hard disk, it remains there till you erase it.
CD and DVD very useful storage devicesRound discs with shiny surfaces. very useful storage devices Can store music, games and movies
CD and DVD DVD CD Similar in appearance but the storage capacity of DVD is several times more than a CD.
Flash Drive (Pen Drive)
Flash Drive (Pen Drive)Small device used to store information. It can be connected to the USB port of the computer
We can transfer data from one computer to another.Flash Drive (Pen Drive) We can transfer data from one computer to another.
The information is lost when the computer is switched off.This memory is called temporary or primary memory. The primary memory is in the CPU.
A computer can remember data and instructions.What is a computer memory? A computer can remember data and instructions. The information of the work we did in a computer is stored for a short time.
These are called secondary storage devices.The computer devices like hard drive, CD/DVD and flash memory stores information permanently. These are called secondary storage devices.
The actual work done by the computer after we put in the data.COMPUTER DEVICES Processing Devices The actual work done by the computer after we put in the data.
CPU (Central Processing Unit)It stores input data and instructions. It processes data to give the output. It sends the data to the output devices.
Hardware are the parts of the computer that you can touch and feel.
Software Software is the set of instructions given to the computer to do a task. This set of instructions that helps the computer to work is called computer program or software.
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