Fundamental Information Technology

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Fundamentals of Information Technology

FUNDAMENTALS OF INFORMATION TECHNOLOGY
ITEC1104

LECTURE NOTES
(FOR THEORY PORTION OF SYLLABUS ONLY)

© Copyright 2012
Mrs. G. Campbell

1

Fundamentals of Information Technology

TABLE OF CONTENTS
UNIT I - Introduction to Computers and Information Technology (6 hours) ........................... 6 Introduction to Information Technology .................................................................................... 6 Definition of Information Technology.................................................................................... 6 Purpose of Information Technology ....................................................................................... 6 Functions of Information Technology .................................................................................... 6 Benefits of Information Technology....................................................................................... 6 What is a computer?................................................................................................................ 7 Definition of computer system................................................................................................ 7 Definition of hardware ............................................................................................................ 7 Functions of computer systems ............................................................................................... 8 Computer design ......................................................................................................................... 9 Factors that influence design – operating environment, quantity of data, speed, physical size, power consumption, communication requirements ........................................................ 9 Categories ............................................................................................................................. 10 Personal (PC)/Micro-computer ............................................................................................. 11 Mini/Midrange ...................................................................................................................... 11 Mainframe ............................................................................................................................. 11 Super ..................................................................................................................................... 12 The System Unit ....................................................................................................................... 13 Definition of system unit ...................................................................................................... 13 Types of system units - form factor, foot print ..................................................................... 13 Memory (RAM, ROM, PROM, EPROM, EEPROM, Cache).............................................. 14 CPU – Parts and their functions ............................................................................................ 17 Instruction and Execution Cycles ......................................................................................... 19 Storage (Secondary) .................................................................................................................. 20 Units of measurement for storage media .............................................................................. 20 Storage devices: magnetic, optical and flash ........................................................................ 20 Other peripheral devices: .......................................................................................................... 25 Input ...................................................................................................................................... 25 Output...
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