R

Rack Space

Physical storage unit for computers or network devices.

RAM

An acronym for Random Access Memory, a type of computer memory that can be accessed randomly; that is, any byte of memory can be accessed without touching the preceding bytes. RAM is the most common type of memory found in computers and other devices, such as printers.

Real-Time

Occurring immediately. The term is used to describe a number of different computer features. For example, real-time operating systems are systems that respond to input immediately.

Real-Time Credit Card Transaction Processing

Includes the establishment of Internet merchant accounts, and provides the ability to immediately accept and process credit cards online including authorization and daily online settlements.

Remote Administration

Administering a computer or network from a remote location.

ROM

Pronounced rahm, acronym for Read-Only Memory, computer memory on which data has been prerecorded. Once data has been written onto a ROM chip, it cannot be removed and can only be read.

Root Directory

The top directory in a file system. The root directory is provided by the operating system and has a special name; for example, in DOS systems the root directory is called \. The root directory is sometimes referred to simply as the root.

Router

A device that connects two Local Area Networks. Routers are similar to bridges, but provide additional functionality, such as the ability to filter messages and forwardthem to different places based on various criteria. The Internet uses routers extensively to forward packets from one host to another.

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