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Class notes Age 202 Computer Science
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NATIONAL OPEN UNIVERSITY OF NIGERIASCHOOL OF SCIENCE AND TECHNOLOGY
COURSE CODE: AGE 202
COURSE CODE: INTRODUCTION TO COMPUTER
SCIENCE
, MAIN
COURSE
CONTENTS PAGE
Module 1 Understanding the Computer …………………… 1
Unit 1 Basic Concepts……………………………….…..… 1
Unit 2 A Historical Overview of the Computer…………… 9
Unit 3 Classification of Computers…………………….….. 20
Module 2 Computer Hardware ……………………………. 28
Unit 1 Hardware Components (1)………………………... 28
Unit 2 Hardware Components (2) – Peripheral Devices…. 41
Unit 3 Auxiliary Equipment…………………………....…. 54
Module 3 Computer Software …………………………..…. 58
Unit 1 Computer Software (1)………………………….… 58
Unit 2 Computer Software (2)…………………………..… 70
Module 4 Programming the Computer ……………………. 76
Unit 1 Computer Languages…………………………….... 76
Unit 2 Basic Principles of Computer Programming……..... 85
Unit 3 Flowcharts and Algorithms……………………….… 92
Module 5 Computer Application Programming Using
Visual Basic ………………………………………. 103
Unit 1 Programming in Visual Basic (1)……………...…. 103
Unit 2 Visual Basic Project Window……………………. 110
Unit 3 Creating Menu Applications……………………... 118
Unit 4 Analysing Visual Basic Data…………………..…. 127
Module 6 Areas of Application of Computers …………..…. 136
Unit 1 Application of Computers in Education………..…. 136
Unit 2 Computer Applications in Business and Industry 139
Unit 3 Computer Applications in Government, Science,
Engineering, Transport, Communications,
Recreation and the Military …………………………. 147
Module 7 Threats to the Computer ………………………...… 155
Unit 1 Computer Virus…………………………………..… 155
ii
, COURSE
GUIDE
AGE 202
INTRODUCTION TO COMPUTER SCIENCE
Course Team Samuel O. Oluwadare (Course Writer) - Federal
University of Technology, Akure-Nigeria
Professor A. Adebanjo (Programme Leader) -
NOUN
Dr. Jari Sanusi & Adams, A. E (Course
Coordinators) – NOUN
NATIONAL OPEN UNIVERSITY OF NIGERIA
iii
, National Open University of Nigeria
Headquarters
14/16 Ahmadu Bello Way
Victoria Island, Lagos
Abuja Office:
5, Dar es Salaam Street
Off Aminu Kano Crescent
Wuse II, Abuja
e-mail: centralinfo@nou.edu.ng
URL: www.nou.edu.ng
Published by
National Open University of Nigeria
Printed 2008
Reprinted 2014
ISBN: 978-058-258-4
All Rights Reserved
iv
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