PC.netPC.net

PC Glossary

Definitions of Computer and Internet Terms

Computer Terms Beginning with "D"

DAC Stands for "Digital-to-Analog Converter" and is often pronounced "dac." Since computers only recognize digital...
Daemon The word "daemon" actually comes from the Greek language, meaning an "inner or attendant spirit" (Oxford American...
Dashboard Dashboard is a user-interface feature Apple introduced with the release of Mac OS X 10.4 Tiger. It allows access to...
Data Computer data is information processed or stored by a computer. This information may be in the form of text documents...
Data Management Data management refers to the way individuals, companies, and organizations manage computer data. It includes micro...
Data Transfer Rate The data transfer rate is commonly used to measure how fast data is transferred from one location to another. For...
Data Type A data type is a type of data. Of course, that is rather circular definition, and also not very helpful. Therefore, a...
Database A database contains data stored in a structured format. It includes one or more tables, which each contain multiple...
DBMS Stands for "Database Management System." In short, a DBMS is a database program. Technically speaking, it is a...
DDL DDL is short for "Data Definition Language." It is used to define the structure of a database, including the tables...
DDR Stands for "Double Data Rate." It is an advanced version of SDRAM, a type of computer memory. DDR-SDRAM, sometimes...
DDR2 Stands for "Double Data Rate 2." DDR2 RAM is an improved version of DDR memory that is faster and more efficient. Like...
DDR3 Stands for "Double Data Rate Type 3." DDR3 is an SDRAM specification introduced in 2007. Compared to previous DDR...
Debug Computer programmers, like everybody else, are not perfect. This means the programs they write sometimes have small...
Debugger Even the most experienced software programmers usually don't get it right on their first try. Certain errors, often...
Default This term is used to describe a preset value for some option in a computer program. It is the value used when a...
Defragment Defragmenting your hard disk is a great way to boost the performance of your computer. Though the term "defragment...
Degauss Ever wonder what that "degauss" button on your monitor does besides make a buzzing noise and cause the screen to go...
Del.icio.us Del.icio.us, pronounced simply "delicious," is a community bookmarking website in which users can save Web pages they...
Delete Delete is computer terminology for remove or erase. You can delete text from a document of delete entire files or...
Desktop Your computer's desktop is much like a physical desktop. You probably keep a number of commonly used items on your...
Desktop Computer A desktop computer is a computer system designed to be used at a table or desk. Some desktop computers have a separate...
Desktop Publishing When documents and images are printed, they are "published." Before computers became commonplace, the publishing...
DHCP Stands for "Dynamic Host Configuration Protocol." A network server uses this protocol to dynamically assign IP...
Dial-up A dial-up connection uses a modem to connect to an ISP or another computer. It uses standard analog phone lines to...
Dialog Box As the name implies, a dialog box serves to initiate a dialog with the user. It is a window that pops up on the screen...
Digital Digital information is stored using a series of ones and zeros. Computers are digital machines because they can only...
Digital Camera A digital camera is an electronic device that captures images in a digital format. It works in a similar way to a...
Digital Signature A digital signature is a block of data that can be attached to documents such as PDFs, word processing files, and...
Digitize When you "digitize" something, you convert it from analog to digital. For example, if you import a VHS tape from a VCR...
DIMM Stands for "Dual In-Line Memory Module." It is a type of computer memory. A DIMM is a small circuit board that holds...
Direct Digital Marketing Direct Digital Marketing, or DDM, is a type of marketing that is done through a digital medium. Common DDM mediums...
Direct3D Direct3D is an application program interface (API) developed by Microsoft that provides a set of commands and functions...
Directory A directory is another name for a folder. Files on your hard disk are organized into various folders, or directories...
DirectX DirectX is a set of standard commands and functions that software developers can use when creating their programs...
Disk Drive The term "disk drive" is a general term that describes a device that reads and/or writes data to a disk. It is often...
Disk Image A disk image is a software copy of a physical disk. It saves the entire data from the disk, including the file...
Dithering Dithering is a process that can be applied to both digital images and audio files. For digital images, dithering adds...
DLL Stands for "Dynamic Link Library." A DLL (.dll) file contains a library of functions and other information that can be...
DMA Stands for "Direct Memory Access." DMA is a method of transferring data from the computer's RAM to another part of the...
DNS Stands for "Domain Name System." The primary purpose of DNS is to keep Web surfers sane. Without DNS, we would have...
DNS Record DNS records are stored in zone files and are used for translating domain names to IP addresses. They also contain...
Dock The Dock is a feature of the Mac OS X Finder that provides quick access to programs, files, and folders. By default...
Document A document is a type of file that has been created or saved by an application. For example, a text file saved with...
Domain While the term "domain" is often used synonymously with "domain name," it also has a definition specific to local...
Domain Name A domain name is used to identify a website. Businesses commonly have a domain name that is their name with the ".com...
Domain Suffix A domain suffix is the last part of a (domain name|domain_name). Common examples include ".com," ".net," and ".org...
Dongle This funny-sounding computer term has two widely different definitions that are completely unrelated: 1. A security...
DOS Stands for "Disk Operating System." DOS was the first (operating system|operating_system) used by IBM-compatible...
Dot Matrix A dot matrix is a 2D matrix of dots that can represent images, symbols, or characters. They are used for electronic...
Dot Pitch This is the measurement used to determine how sharp the display of a CRT (Cathode Ray Tube) monitor is. It is measured...
Double Click Double clicking involves clicking your mouse button quickly two times. To perform a double click, and not just two...
Download This is the process in which data is sent to your computer. Whenever you receive information from the Internet, you...
DPI Stands for "Dots Per Inch." DPI is used to measure the resolution of an image both on screen and in print. As the...
Drag You can use your mouse to drag icons and other objects on your computer screen. Dragging icons from your desktop or an...
DRAM Stands for "Dynamic Random Access Memory." DRAM is a type of RAM that stores each bit of data on a separate capacitor...
Driver This term usually refers to the person behind the wheel of a moving car. In the computer world, however, a driver is a...
DRM Stands for "Digital Rights Management." DRM refers to a collection of systems used to protect the copyrights of...
Drop Down Menu A drop down menu is a horizontal menu that displays a list of options when one of the primary menu items is selected...
DSL Stands for "Digital Subscriber Line." It is medium for transferring data over regular phone lines and can be used to...
DSLAM Stands for "Digital Subscriber Line Access Multiplexer." A DSLAM is a device used by Internet Service Providers (ISPs...
DTD Stands for "Document Type Definition." A DTD defines the tags and attributes used in an XML or HTML document. Any...
Dual-Core A dual-core processor is a CPU with two processors or "execution cores" in the same integrated circuit. Each processor...
DV Stands for "Digital Video." Unlike traditional analog video, which is captured frame by frame on a tape, digital video...
DVD Stands for "Digital Versatile Disc." It can also stand for "Digital Video Disc," but with the mulitple uses of DVDs...
DVD+R Stands for "Digital Versatile Disc Recordable." DVD+R discs look the same as regular DVDs, but can be used to record...
DVD+RW Stands for "Digital Versatile Disk Rewritable." A DVD+RW is like a DVD+R, but can be erased and rewritten. DVD+RWs...
DVD-R Stands for "Digital Versatile Disc Recordable." A DVD-R looks the same as a regular DVD, but like a CD-R, it can be...
DVD-RAM DVD-RAM stands for "Digital Versatile Disc - Random Access Memory." It is one of three rewriteable DVD formats, along...
DVD-RW Stands for "Digital Versatile Disk Rewritable." A DVD-RW is like a DVD-R but can be erased and written to again. Like...
DVI Stands for "Digital Video Interface." DVI is a video connection standard created by the Digital Display Working Group...
DVR Stands for "Digital Video Recorder." A DVR is basically a VCR that uses a hard drive instead of video tapes. It can...
Dynamic Website A dynamic website contains Web pages that are generated dynamically. Each time a user accesses a page within a dynamic...

D

space