O'Reilly logo

CompTIA A+ Certification All-in-One Exam Guide, Ninth Edition (Exams 220-901 & 220-902), 9th Edition by Mike Meyers

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

CHAPTER 3

The Visible Computer

In this chapter, you will learn how to

•   Describe how computing devices work

•   Identify common connectors and devices on a typical computer system

•   Discuss features common to operating system software

Charles Babbage didn’t set out to change the world. He just wanted to do math without worrying about human error, something all too common in his day. Babbage was a mathematician in the nineteenth century, a time well before anyone thought to create electronic calculators or computers (see Figure 3-1). When he worked on complex math, the best “computers” were people who computed by hand. They solved equations using pen and paper.

Figure 3-1 Charles Babbage, father of the computer

Babbage thought of making ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required