
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.
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 rateThe frequency with which a monitor can redraw a screen image. The faster the refresh rate, the less the screen will flicker.
ResetTo restart a computer without turnin it off. You can reset your computer by pressing (ctrl)0000(71 . 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 directoryThe highest or main directory in a hierarchical disk directory structure. All other directories are subdirectories of the root directory.
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