| A | B |
| Abacus | the first counting and calculating machine invented by the Chinese about 4,000 years ago. |
| Active Cell | the cell in a spreadsheet where information will be placed. It is the cell that has been selected. |
| Align-on | The tab marker that will set the tab spacing to line up with a specific character. |
| Application Software | helps you perform a specific job on your computer. Examples include word processing and spreadsheets. |
| Arithmetic Logic Unit | the part of the CPU where mathematicl and logical (yes or no) operatings are performed. |
| Artificial Intelligence (AI) | a computer term used when a computer seems or appears to be thinking like a human. |
| Arrow Keys | keys on a keyboard that move the cursor left or right, up or down. |
| ASCII | American Standard Code for Information Interchange |
| AutoSum | Addition of a column of numbers. |
| BPS | Bits per Second, the speed. A modem's speed is measured by now many bits it can transfer per second. |
| Backspace/delete key | key on a keyboard that moves the cursor to the left one space at a time and deletes characters. |
| Basic | Beginner's All-Purpose Symbolic Instruction Code is the most common computer language. |
| BIT | a binary digit, or or 1, it is the smallest unit of data that a computer can process. |
| Booting | the process of loading the operating system software into memory to start up a computer. |
| Browse | enables you to look through a database. |
| Bug | a programming error. |
| Bulletin Board Service (BBS) | a place on the network where public messages can be left and one message can reach all users. |
| Byte | it is equal to 8 BITS of data. |
| C | a general-purpose computer language. |
| Cable | used to connect peripheral devices to your computer. |
| CAPS lock key | key on a keyboard that is used to key all capital letters. |
| Carriage return | this occurs when enter is pressed. It send the cursor to a new line. |