Epson Endeavor - Manual (Page 182)

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 flicker.
Reset
To restart a computer without turnin it off. You can reset your
computer by pressing . Resetting erases all
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).
Glossary 19