Reset

To reload a computer’s operating system so you can retry a task or begin using a different operating system. Resetting erases all information in RAM.

RCB

Red Green Blue. A type of color monitor.

ROM

Read Only Memory. A portion of memory that can only be read and cannot be used for temporary storage. ROM retains its contents even when you turn off the power.

Root directory

The top-level directory in MS-DOS, designated by a \ (backslash). All other directories are subdirectories of the root directory.

RS-232C

A widely used, standard type of serial interface. You can connect an RS-232C compatible device to the built-in port on your computer.

Sector

A contiguous section of a disk track that provides an address at which the computer can access data.

Self lest

The initial diagnostics procedures a system performs to check its hardware.

Serial

The type of interface that transmits data one bit at a time. See also Interface and Parallel.

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