Glossary 241

Terms

disk drive — The device that reads and writes information and programs on a diskette or hard disk. It rotates the disk at high speed past one or more read/write heads.

diskette — A thin, flexible disk in a protective jacket that stores magnetically encoded data. Diskettes can be removed from the computer and come in two sizes: 5.25-inch and 3.5-inch. Your computer uses 3.5-inch diskettes. See also double-density diskette, high-density diskette.

document — Any file created with an application and, if saved to disk, given a name by which it can be retrieved. See also file.

double-click— To press the TouchPad control button or mouse button rapidly twice without moving the TouchPad or mouse. Refers to the primary TouchPad control button or left mouse button, unless otherwise stated.

double-density diskette — A 3.5-inch diskette that can hold up to 720 KB of information (half the capacity of a high-density diskette). See also diskette, high-density diskette.

download — (1) In communications, to receive a file from another computer through a modem or network. (2) To send font data from the computer to a printer. See also upload.

drag — To hold down the TouchPad control button or mouse button while moving the cursor to drag a selected object. Refers to the primary TouchPad control button or left mouse button, unless otherwise stated.

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.

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

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