DASD: Acronym for direct-access storage device.
Data: Facts or observations about physical phenomena or business transactions.
Data Access Diagram: A graphic tool for depicting the ways by which a data store can be referred to by means of the information contained in another data store.
Data Administration: A data resource management function, which involves the establishment and enforcement of policies and procedures for managing data as strategic corporate resource.
Data Compression: A technique that saves storage space by eliminating gaps, empty fields, redundancies, or unnecessary data to shorten the length of records or blocks.
DDE: Dynamic Data Exchange. An interprocess communication method that allows two or more programs running simultaneously to exchange data and commands.
DDI: Device driver interface.
Debug: The detect, locate, and remove errors from a program or malfunctions from a computer.
Debugging: The process of removing defects from a computer system.
Decimal System: The base 10 numbering system using the digits 0 through 9.
Default Data: Values that are automatically provided by software to reduce keystrokes and to improve the productivity of computer user. However, the user has the option of replacing default data with other values when such action is needed.
Default Setting: In application software, a parameter that is automatically entered unless changed by the user.
Delayed Write: A form of caching in which control is returned before the data is actually written to the storage media.
Delete: An application-software feature that allows existing text, data, fields, records, or files to be removed.
Demand paging: A method by which code and data are moved in pages from physical memory to a temporary paging file on disk.
Device Driver: An interface module between the device-independent portions of the operating system and an actual hardware device which converts device-independent requests into the actual sequence of device operations to perform the requested action.
Device node: The basic data structure for a given device, built by Configuration Manager; sometimes called devnode. Device nodes are built into memory at system startup for each device and enumerator with information about the device, such as currently assigned resources. The complete representation of all device nodes is referred to as the hardware tree.
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