Toshiba A45 Series manual DVD-ROM digital versatile or video disc read-only memory

Glossary 259

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driver — See device driver.

DVD — An individual digital versatile (or video) disc. See also DVD-ROM.

DVD-ROM (digital versatile [or video] disc read-only memory)

—A very high-capacity storage medium that uses laser optics for reading data. Each DVD-ROM can hold as much data as several CD-ROMs. Compare CD-ROM.

emulation — A technique in which a device or program imitates another device or program.

enable — To turn on a computer option. See also disable.

executable file — A computer program that is ready to run. Application programs and batch files are examples of executable files. Names of executable files usually end with a .bat or .exe extension.

extension — See file extension.

external device — See device.

file — A collection of related information, saved on disk with a unique name. A file may be a program, information used by a program, or a document. See also document.

file allocation table (FAT) — The section of a disk that keeps track of the location of files stored on the disk.

file name — A set of characters that uniquely identifies a file within a particular folder. It consists of two parts: the actual name and the file name extension. See also file extension.

file extension — The three characters following the period (pronounced “dot”) at the end of a file name. The extension indicates the type of file. Examples are .exe for program files and .hlp for help files. See also file name.

folder — Also called directory. A container for organizing files saved to a disk. A folder is symbolized on screen by a graphical image (icon) of a file folder. A folder can contain files and other folders.