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Read/write head
The physical device inside a disk or tape drive that reads data
from and writes data to the magnetic surface of the disk or tape.
Real-time clock
A clock inside the computer that keeps track of the time and
date, even when the computer is turned off, by using power
from a backup battery.
Refresh rate
The frequency with which a monitor can redraw a screen
image. The faster the refresh rate, the less the screen will Bicker.
The Wingine video controller in your computer provides
extremely fast refresh rates, up to 72 Hz.
Reset
To restart a computer without turning it off. You can reset your
computer by pressing (m-1 w
data stored in RAM and reloads your operating system.
ROM
Read Only Memory. A portion of memory that can only be read
and cannot be modified. ROM retains its contents even when
you turn off the computer by using power from a backup
battery.
Root directory
The highest or main directory in a hierarchical disk directory
structure. All other directories are subdirectories of the root
directory. MS-DOS designates the root directory with a \
(backslash).
. Resetting erases all
Glossary 19
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