Chapter 21
Fiber Optics 351
Fiber Optics Technology 351
Advantages of Fiber-Optic Cable 354
Disadvantages of Fiber-Optic Cable 354
Splicing Fiber-Optic Cable 354
Future of Fiber Optics 358
Chapter 22
Switches 361
Relays 361
Timed Relays 368
Solenoids 372
Other Switches 372
Chapter 23
Computers 377
Types of Computers 378
Parts of a Computer 379
Networks 387
Software 388
Programmable Logic Controllers 388
Chapter 24
Energy Conservation 393
Ways to Conserve Energy 394
Alternative Energy 400
Chapter 25
Career Opportunities 409
Determining Your Career Path 409
Five Areas of Opportunity 411
Seeking Employment 414
Work Performance 416
Reference Section 419
Formulas in Common Use 419
Electrical and Electronic Symbols 421
Resistor Color Code 423
Diode Color Code 423
Frequency Bands 423
Metric Prefi xes 424
Standard Abbreviations 424
Dimensions and Resistances of
Copper Wire 425
Twist Drill Sizes and Decimal
Equivalents 426
Microelectronics and Semiconductor
Web Sites 428
Informational Web Sites 428
Glossary 429
Index 443
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