Section Review 1.1 Copyright Goodheart-Willcox Co., Inc. Chapter 1 Introduction to Information Technology 15 Check Your Understanding 1. List the four phases of the digital revolution. 2. A measure of the amount of data that can travel on a communication system is called _____. 3. What are four main categories of computers? 4. What are the four functions of a computer? 5. What does an input device provide to the computer? Build Your Vocabulary As you progress through this course, develop a personal IT glossary. This will help you build your vocabulary and prepare you for a career. Write a definition for each of the following terms and add it to your IT glossary. central processing unit (CPU) cloud computing computer digital revolution hard disk drive hardware input mainframe computer motherboard output peripheral device personal computer port processing random-access memory (RAM) read-only memory (ROM) server supercomputer volume label Component Identification Using the image shown, identify the computer hardware components labeled by number. Hands-On Example 1.1.2 3 1 2 1. Object number 1 is called a(n) _____. 2. Objects number 2 are _____. 3. Assembly number 3 is called a(n) _____. vetkit/Shutterstock.com