DAT: Digital audiotape; A type of computer backup drive that copies data to a tape.

DC power: Power that comes from the battery that powers a laptop.

DDR: Double data rate; A computer DIMM memory module that’s still in general use.

DDR2: Memory modules that double the data transfer rate between your RAM and your motherboard.

desktop: A normal computer setup; A type of computer made up of a PC console, monitor, mouse, keyboard, and any additional attachments. A desktop PC isn’t easily portable.

dialup: A kind of computer Internet connection that uses existing phone lines.

digital: A means of storing, transmitting, manipulating, or reproducing data, images and sounds by using groups of electronic bits represented by 1 and 0.

DIMM: Dual Inline Memory Module; A standard type of computer memory module.

DIMM slot: Dual in-line memory module slot, a small circuit board that holds memory chips.

DirectX: A driver used by games, graphics, and audio programs in Windows.

disk drive: A component of a computer that reads information from and writes information to a certain kind of disk.

display: The information that appears on your computer screen.

drive cage: A contraption used to hold a PC’s internal disk drives, an optical (DVD) drive, and a hard drive.

driver: A special type of program that allows specific computer hardware to work.

DSL: Digital Subscriber Line; a type of Internet connection that takes advantage of unused frequencies in existing phone lines.

dual-core: A CPU made up of two independent processors combined onto a single integrated circuit.

DV: Digital video; used to describe camcorders that record video digitally.

DVD: Digital video disc; a removable computer storage medium that has a larger capacity than a CD.

DVD drive: A disk drive in or attached to your computer that can read information from DVDs and CDs.

dye-sublimation: A type of printer that transfers heated solid due from a ribbon to specially coated paper, producing continuous tones, like those in a photo produced from a negative.

Dynamic Host Configuration Protocol (DHCP): A protocol for assigning dynamic IP addresses to devices on a network.