| A | B |
| CD-ROM | a compact disk that reads only memory. |
| Channel | the media that carries or transports the message. |
| Computer | an electronic device that receives, processes, and stores data; produces a result. |
| Control Unit | the part of the computer that directs instructions. |
| CPU | Central Processing Unit; the brain of the computer. |
| Data | new facts entered into the computer. |
| Desktop computer | designed to be used on a desktop. |
| Disk | a storage device. |
| Ergonomics | science of designing equipment and workspace to be comfortable and safe. |
| File | a document stored on a disk. |
| File server | the central computer for local area network computers. |
| Hard Copy | a printed copy of output. |
| Hard Disk Drive | a device that holds information. |
| Hardware | physical parts of a computer. |
| Information Processing Cycle | the interactions of humans and computers. |