S.6 Icttheory Paper. Caltec S.6

TOBBY OKOL ECAT Tel: 0787401800/0751269627 , E-mail: tobbyecat@gmail.com 1 TABLE OF CONTENTS TOPIC 1: INTRODUCTION TO COMPUTING………………………………………………… …...………2 TOPIC 2: COMPUTER MANAGEMENT……………………………………………… …………... ………36 TOPIC 3: COMPUTER LABORATORY CARE & MAINTENANCE………… …………………. ……… 47 TOPIC 4: COMPUTER HARDWARE S …………… ………… …………………………… ………… …… 63 TOPIC 5: COMPUTER SOFTWARE S ………………………………… …………... ………………… ….127 TOPIC 6: WORD PROCESSING ………………………………………… ……………….. ………… …… 149 TOPIC 7: ELECTRONIC SPREADSHEETS ………………………… …………………….. …….………153 TOPIC 8: ELECTRONIC PRESENTATION ……………………… ………………. ……………… …… 158 TOPIC 9 : DATABASE ……………………………………………… ………… ……… ……………… …… ..161 TOPIC 10 : ELECTRONIC PUBLICATION……………………… ………. ………………………… …….168 TOPIC 11 : DATA COMMUNICATION & NETWORKING…………………. …………………… …….. 170 TOPIC 12: INTERNET AND WORLD WIDE WEB …………………………………………… …………. 224 TOPIC 13: SYSTEM SECURITY, ICT ETHICAL ISSUES AND EMERGIN G TECHNOLOGIES …… 253 COMPUTER ABBREVIATIONS AND GLOSSARY…… ………………… ……………………… …… ……… 277 TOBBY OKOL ECAT Tel: 0787401800/0751269627 , E-mail: tobbyecat@gmail.com 2 TOPIC 1: INTRODUCTION TO COMPUTING Introduct ion to Computers Etymologically , the term computer is derived from a Latin word “ Compu tare” meaning a calculating machine or a programmable machine. Therefore a computer can be defined as a multipurpose, a utomatic and electronic device that allows the user to input data, store data and information in its own memory, process input data and output information for future reference . It is an electronic device that converts raw data into meaningful information. It can also be described as an automatic machi ne made up of electronic and electromechanical device which manipulates and processes data. Characteristics of Modern co mputers 1. Speed Computers are quite fast in their operation in that their speed is measured in Millions of Instructions per Second (MI PS) or Megahertz (MHz) . Inside the computer's system unit, the processing occurs through electronic circuits. Data and program instructions travel …