Data Warehousing   A data warehouse brings together data from multiple transactional systems and enables users to access and analyze the information at various levels, from departmental to divisional, throughout the enterprise. Database   A collection of Data organized & designed for easy access. A collection of customer names & addresses may form the content of a database. DDE   Dynamic Data Exchange. When 2 or more programs that support DDE are running simultaneously, they can exchange information and commands. For example, a spreadsheet with a DDE link to a communications program might be capable of keeping stock prices that are displayed in the spreadsheet current with trading information received over the communications channel. Debit Card   Cash substitute for consumers. They look like credit cards, but do not provide credit. Amounts for purchases are debited immediately from the user's bank balance. Digital Certificates   Digital Ids used to present credentials online. Digital certificates are issued by companies, which act as "trusted third parties." In a SET transaction, the buyer, the merchant and banks for these parties all has digital certificates. Digital Coins   Downloaded to a user's hard drive from an account at a bank. When the shopper wants to pay, a "wallet" pops open on their screen. "Coins" are transferred from the shopper's computer to the online merchant's server. The merchant deposits the "coins" in their bank. Digital Wallet   Software that stays resident on the hard drive of an online shopper. When they are ready to make a purchase, the "wallet" pops open to reveal payment options. Some "wallets" hold credit cards with encrypted information. Other "wallets" hold digital coins. Distributed Architecture   A set of interacting computer systems, databases, and workstations situated in different locations. You can allocate the various components across a department or enterprise-wide network. DNS   The Domain Name System is how the Internet links together the thousands of Networks, which it is comprised of. The DNS is utilized whenever you send an Email or access a particular Web Page. Domain Name   The Domain Name is a unique name, which represents each computer on the Internet. (Some machines do have more than one Domain Name. The DNS converts the Domain Name requested by an Internet User into an IP Address. The location of the machine with this IP address is known & the information being requested can then be found. "www.4guys.com" is an example of a Domain Name. The "com" indicates that 4 Guys Interactive is a commercial Organization.