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. 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 [ctr(] (F] [El. 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).

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