Glossary 265

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 Dual Mode Pad control button or mouse button rapidly twice without moving the cursor or mouse. In the Windows® operating system, this refers to the primary Dual Mode Pad 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 Dual Mode Pad control button or mouse button while moving the cursor to drag a selected object. In the Windows® operating system, this refers to the primary Dual Mode Pad 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.

E

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

 

 

device or program.

 

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