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Read/write head
The physical device inside a disk drive that reads and records
data on the magnetic surface of a disk.
Real-time clock
A battery-powered clock inside the computer that keeps track
of the time and date, even when the computer is turned off.
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.
RGB
Red Green Blue. A type of color monitor.
ROM
Read Only Memory. The portion of the computer's 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.
16
Glossary
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