Consider this sentence: “ Computers are everywhere." Does it sound
like an overstatement? A cliche? No matter how you perceive the impact of computers, the statement is true. Computers are everywhere. In
fact, you can find them in some pretty unlikely places, including your
family car, your home appliances, and even your alarm clock!
In the past two decades, computers have reshaped our lives at home,
work, and school. The vast majority of businesses now use computerized equipment in some way, and most companies are networked both internally and externally. Workers who once had little use for technology now interact with computers almost every minute of the workday.
This subject examines the many types of computers that are in common use today. Although this class will focus on personal computers (the ones that seem to sit on every desktop), you will first learn about
the wide variety of computers that people use, and the reasons they
use them. As your knowledge of computers grows, you will understand
that all computers—regardless of their size or purpose—are basically
similar. That is, they all operate on the same fundamental principles, are
made from the same basic components, and need instructions to make
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