Computer Concepts

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: [e-mail]
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 letters, Units to Measure Memory
3. Software: System software and application software
4. Important Terms: Files & folders, Mother Board, Ports, Cards, Data Bus 1. INTRODUCING COMPUTER

1.1 Introduction to input-process-output sequence

Any activity has an input-process-output sequence. For example, for preparing milk shake, milk, sugar and flavour are the input. These things are processed in a mixer and the milk shake is the final output.

Example of Human Beings

When the teacher asks the student to ADD 5 & 2. It forms an input to the student. The addition is performed in the brain of the student - process
When the result is spoken out by the student, it forms the output

1.2 What is a computer?

Computer is a data processing tool. It takes Data and commands as input. Computer processes the data according to the commands and provides the resulting information as an output.

1.3 Where do you use a computer?

Computers are used at various places for example:

LIBRARIES: Computers are used in the library for producing and maintaining catalogue of the available books. They are also used by the members to search for their topics in the available books. The computers are also used for maintaining the records of