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Random Access Memory (RAM)
RAM is a computer's main working memory. Applications use RAM to hold instructions and data during processing. Applications can repeatedly write new data to the same RAM, but all data is erased from RAM when the computer loses power or is shut down.

Redirector
A redirector is a client software component in a client/server configuration. It is normally used in reference to the Novell NetWare NOS. The redirector is responsible for deciding if a request for a computer service (i.e., read a file) is for the local computer or network server.

Repeater
A repeater connects one cable segment of a LAN to other segments, including connecting differing media. For example, a repeater connects thin Ethernet cables to thick Ethernet cables. It regenerates electrical signals from one segment of cable onto all other segments. Because a repeater reproduces exactly what it receives, bit by bit, it also reproduces errors.

RJ-45 Connector
An RJ-45 connector is a snap-in connector for UTP cable, similar to the standard RJ-11 telephone cable connector.

RS-232
RS-232 cables are used for connecting a computer to a modem. The RS-232 specification details the interface between the computer and modem.