Introduction to Information Technology

By Chris Koch

TABLE OF CONTENTS Chapter 1 Information Technology: An Introduction ....................................... 1 Information Science .................................................................................. 1 Sources of Information ........................................................................... 17 History of Computer Technology ........................................................... 37 Electronic Data Processing ..................................................................... 38 Perspective .............................................................................................. 40 Chapter 2 Hardware and Software ................................................................... 41 Computer Hardware ................................................................................ 41 Software .................................................................................................. 81 Chapter 3 Business Software ............................................................................115 Brief History ......................................................................................... 116 Types of Business Tools ....................................................................... 117 Application Support .............................................................................. 152 Support Follow up and Internal Reporting ........................................... 153 Chapter 4 Networks .......................................................................................... 154 Artificial Neural Network ..................................................................... 154 Computer Network ............................................................................... 168 Electrical Network ................................................................................ 188 Radio Network ...................................................................................... 191 Scale-free network ................................................................................ 192 Preface vii Small-world Network ........................................................................... 197 Social Networking Service ................................................................... 201 Telecommunications Network .............................................................. 229 Television Network ............................................................................... 231 Chapter 5 Wireless Information Technology for the 21st Century .............. 243 Introduction ........................................................................................... 243 Wireless Communications Systems ...................................................... 244 Broadband Wireless Systems ................................................................ 254 Pico-cell Wireless Systems ................................................................... 262 Software for Mobile and Embedded Devices ....................................... 269 Security Issues for Wireless Information Technology .......................... 277 Future Wireless Information Technologies ........................................... 289 Bibliography ..................................................................................... 295 Index ................................................................................................. 299