Database - A collection of data consisting of graphics, text and sound that is organized to make viewing, sorting and editing information relatively easy. There are different types of databases including: relational, object-oriented, and distributed databases.

Demo software – Software that gives you temporary use of a full application with some limitations. In some cases certain features maybe disabled or the producted may only work for a short period of time.

Dynamic HTML (DHTML) – The combination of HTML, style sheets, and scripts to make Web pages more interactive.

Dynamic Host Configuration Protocol (DHCP) – A communication protocol that allows a system to dynamically assign IP addresses and other network configurations each time a computer on its LAN starts up or requests a network connection.

Domain – In general, domain refers to a group of computers that are in some way related. When discussion the Internet, a domain is a group of IP addresses that are usually organized in a hierarchical manner. For instance, .com and .edu are two top level domains that refer to addresses that are commercial (.com) or educational in nature. Other examples include: .biz (IPs belonging to businesses), .net (network), .org (organizations) and .ca (Canadian addresses). Within each domain, there can be subdomains that further categorize addresses. For instance: yoursite.on.ca would refer to the address for "yoursite" within the .on (Ontario) subdomain of the .ca (Canada) domain.

Domain name - The name that identifies web sites on the Internet. This name is mapped using DNS servers to specific IP addresses where the web site is located. Example of a domain name: www.lizardsolutions.com

Domain Name System (DNS) – A system that is used to translate domain names into IP addresses thereby allowing us to locate various websites.

Digital Versatile Disc (DVD) – This round high-density mass storage medium disc holds 4.7 gigabyte of information on one of its two sides and has the capability to hold a full length movie.

Disk Operating System (DOS) – The first widely used Operating System in personal computers designed by Microsoft. It is a text-based, line-oriented system that has simple commands but is not very user-friendly. It has since been widely replaced by Microsoft Windows; however you can still access its intreface by running the MS-DOS prompt program.