All computers are systems of input, processing, output, storage, and control components. In this section, we will discuss the trends, applications, and some basic concepts of the many types of computer systems in use today. In Section II, we will cover the changing technologies for input, output, and storage that are provided by the peripheral devices that are part of modern computer systems.

The right peripherals can make all the difference in your computing experience. A top-quality monitor will be easier on your eyes—and may change the way you work. A scanner can edge you closer to that ever-elusive goal—the paperless office. Backupstorage systems can offer bank-vault security against losing your work. CD-ROM drives can be essential for education and entertainment. Memory cards, 3-D graphics, and other devices will help you configure your computer to meet your needs. Some may be the digital equivalent of chrome bumpers and tailfins, but the right choice of peripherals can make a big difference [10].