Satellite® T210/T230 Series User's Guide - Howard Computers
Satellite® T210/T230 Series User's Guide - Howard Computers
Satellite® T210/T230 Series User's Guide - Howard Computers
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206 Glossary<br />
device — A component attached to the computer. Devices may be<br />
external (outside the computer’s case) or internal (inside the<br />
computer’s case). Printers, disk drives, and modems are examples of<br />
devices.<br />
device driver — A program (called a “driver”) that permits a computer<br />
to communicate with a device.<br />
dialog box — An on-screen window displayed by the operating system<br />
or a program giving a direction or requesting input from the user.<br />
Direct Current (DC) — The type of power usually supplied by<br />
batteries. DC flows in one direction. Compare Alternating Current<br />
(AC).<br />
Direct Memory Access (DMA) — A dedicated channel, bypassing the<br />
CPU, that enables direct data transfer between memory and a<br />
device.<br />
directory — See folder.<br />
disable — To turn a computer option off. See also enable.<br />
disc — A round, flat piece of material, designed to be read from and<br />
written to by optical (laser) technology, and used in the production<br />
of optical discs, such as CDs and DVDs. Compare disk.<br />
disk — A round, flat piece of material that can be magnetically<br />
influenced to hold information in digital form, and used in the<br />
production of magnetic disks, such as hard disks. Compare disc. See<br />
also hard disk.<br />
disk drive — The device that reads and writes information and programs<br />
on a hard disk. It rotates the disk at high speed past one or more<br />
read/write heads.<br />
document — Any file created with an application and, if saved to disk,<br />
given a name by which it can be retrieved. See also file.<br />
double-click — To press and release the pointing device’s primary<br />
button rapidly twice without moving the pointing device. In the<br />
Windows ® operating system, this refers to the pointing device’s left<br />
button, unless otherwise stated.<br />
download — (1) In communications, to receive a file from another<br />
computer through a modem or network. (2) To send font data from<br />
the computer to a printer. See also upload.