| A | B |
| Mainframe | Expensive, room-sized computer, used mostly for large computing jobs. |
| Supercomputer | A super-fast, super-powerful, and super-expensive computer used for applications that demand maximum power. |
| Desktop Microcomputer | Small computer made possible by the microprocessor. |
| Workstation | A high-end desktop computer with massive computing power which is less expensive. |
| Laptop or Notebook Computer | A flat-screen, battery-powered portable computer that you can rest on your lap. |
| Handheld or PDA | A portable computer small enough to be tucked in to a jacket pocket. |
| Server | A computer especially designed to provide software and other resources to other computers over a network. In a local area network under the client/server model, a high speed, high capacity computer containing data and other resources to be shared with client computers. |
| File Server | In a LAN, a computer used as a storehouse for software and data that are shared by several users. |
| LAN Intranetwork | A network in which the computers are close to each other, usually in the same building. Typically includes a collection of computers and peripherals; each computer and shared peripheral is an individual node on the network. |
| WAN Internetwork | A network that extends over a long distance. Each network site is a node on the network.The Internet is an example of a WAN. |
| IP Address | An Internet address; a string of four numbers separated by periods, included with every packet of information that traverses the Internet. |