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INTRODUCTION TO COMPUTER

What is a computer?

A computer is a electronic device, which process raw data in meaningful information.

What is data?

Raw fact and figure that we put into the computer to be turned to meaningful information. Eg: numbers, letters, pictures, sounds.

What is Processing?

Activities performed to convert data into information Eg: sorting, calculating, searching, storing.

What is information

Data that has been converted into a form that meaning for the person who receive it.

What is software?

It is the term used from the actual programs that allows the hardware to do a useful job. Software is made up of series of instructions which instruct the computer what to do. Without software, hardware is useless. Software is sub divided as system software and application software.

What are the main components of the computer system?

¨ Hardware

¨ Software

¨ Live ware

What is live ware?

Live ware are the people who work with the computer.

What are the disadvantages of using computer?

¨ Computers can replace people

¨ Computer hold personal information that can be misused

¨ Problems raise computers cannot be used

¨ Staff needs to be trained at work places

What is hardware?

Parts of the computer that you can touch and handle is a collective name given to all physical device that make up a system. Hardware device are split into following categories.

· Input

          Mouse, keyboard, scanner, microphone

· Output

          Monitor, printer, speaker

· Central Processing Unit (CPU)

 

· Backing Storage Devices

          Floppy Disk, Hard disk, Flash Drive, CD, DVD

 

What are the advantages of using computer?

¨ Computers are accurate

¨ Computers are fast

¨ Computers store large amount of information in a large space

¨ Computers can work continuously 24 hours a day

¨ Computer do jobs that cannot be done by people

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