database

      A collection of data with a given structure of accepting, storing, and providing, on demand, data for multiple users. (T)
    data object
      The means by which a client and server exchange information that is represented by an array of descriptors.
    DBCS
      See double byte character set.
    DBCS Enabling
      DBCS enabling adds the capability to a product for the management of the double byte character set. All data and components in the system that handle a human readable character string use DBCS enabling.
    DCB
      Device control block.
    DCE
      Distributed computing environment.
    DDE
      Dynamic data exchange.
    DDK
      Device driver kit.
    desktop
      A folder that fills the entire screen and holds all the objects with which the user can interact to perform operations on the system.
    device control block (DCB)
      A data structure that contains data and addresses for indirect calls for a logical device.
    device driver
      A program that enables the computer to communicate with a specific peripheral device, such as a pen, video disc player, or CD drive.
    device driver kit
      A set of programming tools and device driver source code provided for device-driver developers.
    device ID
      A unique identification number assigned to a logical device. A device ID is unique across an entire system.
    device object
      An object that provides a means of communication between a computer and another piece of equipment, such as a pen or display.
    DFS
      Distributed file system.
    dialog
      (1) The interaction between a user and a computer. (2) In an interactive system, a series of related inquiries and responses similar to a conversation between two people.
    dialog box
      A movable window, fixed in size, containing controls that a user uses to provide information required by an application so that it can continue to process a user request.
    dialog template
      A series of statements that define the identifier, memory options, dialog-box dimensions, and controls of a dialog.
    digital signal processor. (DSP)
      A high-speed coprocessor designed to do real-time manipulation of signals.
    digitizer
      An electronic device that transmits coordinate data to software running on a computer.
    directive
      A statement that carries out a task such as including a header file, defining constants, or conditionally compiling portions of a resource script file.
    directory
      A type of file containing the names and controlling information for other files or other directories.
    Distributed Computing Environment (DCE)
      A set of standards governed by the Open Software Foundation (OSF) for open computing in distributed systems.
    Distributed file system
      A file system composed of files or directories that physically reside on more than one computer in a communication network.
    Distributed management system
      IBM corporate framework for system management.
    Distributed presentation management
      In IMS/VS, a message format service (MFS) option that allows programs to communicate with device independence by sharing message formatting functions between MFS and a user-written remote program. The user-written remote program performs device-dependent formatting.
    Distributed Presentation Services (DPS)
      In DPPX systems, an IBM licensed program that provides the COBOL and assembler language application programmer with support for formatting and modifying the layout of data on displays and printers.
    Distributed SOM (DSOM)
      Distributed System Object Model. Provides remote access to SOM objects in a transparent way that insulates client programmers from having to know the location or platform type where a target object will be instantiated. DSOM allows programmers to use the same object model independently of whether the objects they access are in the same process, in another process on the same machine, or across distributed networks.
    DLL
      Dynamic link library.
    DMS
      Distributed management system.
    domain
      (1) In the OS/2 operating system, a collection of network objects that a group of users have authorization to use. (2) In speech-recognition systems, a set of vocabularies and language models that are designed to support a particular speech application.
    domain ID
      Domain identification. A short name (or identifier) that is uniquely associated with a domain.
    dominant personality
      A personality that is started first, "provides" the desktop (most likely, the desktop is an application of the dominant personality), and exports a set of support functions to the alternate personalities and Workplace Shared Services.
    DOS
      Disk Operating System, the original operating system used with IBM-compatible personal computers.
    double-byte character set (DBCS)
      A character set whose character codes are represented by two-byte code. Used for code pages for some Asian countries.
    double-click
      To press and release a mouse button twice within a time frame defined by the user, without moving the pointer off the choice. See click
    double-tap
      To touch a touch-sensitive screen with a pointing device twice in rapid succession within a small area.
    DPM
      Distributed presentation management.
    DPS
      Distributed Presentation Services (DPS).
    drag
      To use a pointing device to move an object.
    drop
      To fix the position of an object that is being dragged by releasing the select button on the pointing device.
    DSOM
      Distributed System Object Model.
    DSP
      Digital signal processor.
    dynamic data exchange (DDE)
      In Workplace architecture, a messaging protocol that allows PM applications to exchange data via shared memory. DDE transactions always take place between a client application and a server application. The client initiates a dialog with the server by requesting data from the server. The server responds by providing the requested data to the client.
    dynamic link library (DLL)
      A file containing executable code and data bound to a program at load time or run time, rather than during linking. The code and data in a dynamic link library can be shared by several applications simultaneously. DLLs can be interchanged without recompiling or relinking the applications that use them.


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