Computer Concepts Essay

4090 Words Jan 24th, 2013 17 Pages
COMPUTER CONCEPTS

NATIONAL ASSOCIATION FOR THE BLIND
NEW DELHI

Computer Concepts

Hardware & software concepts explained for persons with low or no vision for the students of Intel Technology Training Lab at National Association for the Blind, New Delhi

Produced and Published by National Association for the Blind
Sector-5, R.K Puram, New Delhi
E-mail: nab@vsnl.com
First Edition
October 2001
Reprint: February 2005

TABLE OF CONTENTS

1. Introducing Computers:
Introduction to input-process-output sequence,
What is a computer?, Where do you use Computer?
2. Hardware Components of the Computer:
Input devices, Output devices, Processing Unit, Memory or Storage,
Drive
…show more content…
RAILWAYS: Computers are used for reservation of tickets.

AIRPORTS: Computers are used in flying the aeroplanes.

OFFICES: Computers are used in offices to handle the routine office work.

2. HARDWARE COMPONENTS OF A COMPUTER

What is hardware and software?

The physical components of a computer are called the hardware. The component that can be touched will come under hardware. All the electronic, electrical and mechanical parts that make a computer are called the hardware. For example, keyboard, monitor, computer chips, system box, etc are the hardware of the computer.

Software is the set of instructions, which run the hardware of the computer. The hardware components of the computer act according to the instructions. These instructions are called the software. In a story book, paper and the ink are the hardware. The story or the meaning conveyed to the reader is the software. Software is the ingredient that set up a computer to perform a certain operation. Brings the machine to life. Data and instructions form the software.

There are four components of a computer:

1. Input devices
2. Output devices
3. Processing unit
4. Memory

2.1 Input Devices: Input devices are those devices that we use to send information into the computer.

Common input devices are:

A. Keyboard: It is a board with 104 keys on it. These keys are divided into four sections: Number keypad, intermediate keypad, typewriter keys and function keys. In the

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