| A | B |
|---|
| Channel | Media-transports data messages |
| Computer | Electronic device that receives, processe, and stores data and produces output |
| Computer system | Hardware, software and data working together |
| Data | Information entered into a computer |
| Data Communications | Enables computers to communicate with each other |
| E-mail | Electronic mail |
Hardware,  | Physical computer equipment |
| Internet | Global network connecting millions of computers |
| Intranet | Internal network that is similar to internet |
Mainframe Computers,  | Large powerful computers |
| Microcomputers | Personal or Desktop computer |
| Minicomputers | larger than a microcomputer but smaller than a mainframe |
Network,  | Connects computers to one another |
| Notebook computer | Small and portable computer |
| PDA | Personal Digitgal Assistant |
| Protocol | Standard format for transferring data |
| Receiver | Computer that receives a data transmission |
| Sender | Computer that sends a data transmissions |
| Software | An application or program |
| Supercomputers | Largest and fastest computer |
| Wide-area networks | A computer network that covers a large area |
