RGB

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 or of other subdirectories.

RS-232C

A widely used, standard type of serial interface. You can easily connect an RS-232C compatible device to the computer.

Scratch memory

The 4KB of SRAM (static random access memory) included in your system to provide extra memory for running programs such as AFDD and ESPEED. The contents of the scratch memory are erased when you turn off your computer.

Sector

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

Self test

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

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