Epson 3865X Plus User Manual page 326

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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