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
DCE
Distributed
computing environment.
DDE
DDK
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
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
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.
[Back: Glossary - C]
[Next: Glossary - E]