ROM (Read-Only Memory)

Computer memory that contains instructions that do not need to be changed, such as operating system startup instructions. The computer can access data from ROM but cannot put new data into it.

RISC (Reduced Instruction Set Computing)

Uses a smaller and simpler set of instructions to control the processor, thereby greatly enhancing the processing speed.

Ring Network

A type of network in which all the servers and clients are connected in a closed loop.

Resolution

A measurement of the detail of images produced by a monitor or printer. Normally measured by a horizontal and vertical number of pixels for monitors or dpi (dots per inch) for laser printers. The higher the number, the better the quality and the more memory required by the system.

Repeater

A device that works like an amplifier; it increases or boosts a signal to allow transmissions over longer distances.