| A | B |
| American Standard Code for Information Interchange (ASCII) | A group that chose which eight bit numbers would represent letters, decimal numbers, and special function characters |
| appliance | A computer that is dedicated to a particular task or function |
| binary | System that has two states that can be represented using zeros and ones |
| bit (b) | A single digit—either a zero or a one—in a binary number |
| central processing unit (CPU) | The "brains" of the computer; performs calculations and controls communication in the computer |
| data | Raw, unprocessed facts and figures |
| dumb terminal | A communication device with a keyboard and monitor that depends on another computer for processing and storage |
| gigabyte | Approximately a billion bytes |
| Linux | An operating system for personal computers based on the UNIX operating system |
| memory | Integrated circuits designed to store data before and after it is processed by the CPU |
| operating system | A type of software program that determines how the processor interacts with the user and with other system components |
| random access memory (RAM) | Integrated circuits that work with the CPU |
| server | A powerful computer that provides a service, such as running a network or hosting an Internet site |
| Web server | Computer that runs software that provides Web pages and runs scripts |