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Read
To move data from one area to another. For example, when you
open a text file stored on disk, the computer reads the data from
the disk and displays it on the screen.
Read/write
head
The physical device inside a disk drive that reads and records
data on the magnetic surface of a disk.
Real&me 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. 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.
16 Glossary