scatter/gather

I/O operations between devices and data in non contiguous memory locations. Scatter: reads data from a device and writes to non contiguous memory locations. Gather: reads data from non contiguous memory locations and writes to a device.

The physical surface of a display device upon which information is shown to a user.

To move a display image vertically or horizontally to view data that otherwise cannot be observed within the boundaries of the display screen

Software Development Environment.

An information item, optionally stored with a registry entry (typically by the owner of the entry), that is used by the Registry Manager in making access decisions.

The security object that makes security access decisions. The interface to this facility is a series of APIs defined in the security documents. The SPF centralizes security access decisions for ease of security evaluation and auditing.

Information string inserted into the message header of each message that is passed between tasks.

(1) A functional unit that provides shared services to workstations over a network; for example, a file server, a print server, a mail server. (T) (2) In a network, a data station that provides facilities to other stations; for example, a file server, a print server, a mail server. (A) (3) In the AIX operating system, an application program that usually runs in the background and is controlled by the system program controller. (4) In AIX Enhanced X-Windows, a program that provides the basic windowing mechanism. It handles interprocess communication (IPC) connections from clients, demultiplexes graphics requests onto screens, and multiplexes input back to clients. (5) See name server. (6) In TCP/IP, a system in a network that handles the requests of a system at another site, called a client-server.

A managed set of useful functions intended for use by multiple clients. The Registry Manager is an example of a service.

Installation programs, remote administrators, or other types of clients that can interact with (get and put) the state of frameworks and service providers through the Workplace Name Services.

See framework service provider.

An interface defined by a framework for service providers. See also framework service provider.

Characteristics of objects that the user can view and sometimes alter.

An object that provides a means of communication between a user and a piece of equipment or a system.

Standard Generalized Markup Language.

The procedure required before turning off the computer to ensure that data and configuration information are not lost.

A sequence of parentheses, numbers, macros, and unary and binary operators that can be evaluated algebraically into an integer.

A character set whose character codes are represented by one-byte code. In contrast to Double Byte Character Set.

Pertaining to use by a single user (for example assumes the user is always the same; it does not distinguish between different users at different times).

A control that represents a quantity and its relationship to the range of possible values for that quantity. For example, a slider might indicate a time range from 0 to 10 minutes. See also slider arm.

The visual indicator in a slider that shows that the numerical value can be changed by manipulating it. See slider.

A function of the installation object that knows sizes and names of all the pieces that are going to be installed, including temporary space requirements for processing lists as well as size requirements for service catalogs and registries.

Symmetric multiprocessing.

A BIOS-level software interface in the PCMCIA architecture that provides a way to access the PCMCIA sockets (slots) of a computer. Socket Services identifies how many sockets are in a computer system and detects the insertion and removal of a PC Card adapter while the system is powered on.

An open 3-dimensional imaging model standard.

A framework used to integrate the use of tools in a customizable manner on the OS/2 desktop.

System Object Model.

Implementation of SOM for OS/2.

The directory from which information is read. Contrast with target directory.

Security policy facility.

Service provider interface.

A worksheet arranged in rows and columns, in which a change in the contents of one cell can cause electronic recomputation of one or more cells, based on user defined relations among the cells. (A)

An ISO standard created by IBM. A generic encoding of information; a metalanguage that provides a grammar or set of rules by which a document interchange technology can be constructed. DTDs define a common set of tags and the relationships that may exist among those tags in a valid instance of that document type.

A type of control file that has an internal script that defines devices and the order of their processing. A stanza consists of a paragraph descriptor, paragraph attributes, and a terminator.

(1) A sequence of elements of the same nature, such as characters considered as a whole. (T) (2) In programming languages, the form of data used for storing and manipulating text.

A class that is derived from another class. The subclass inherits the data and methods of the parent class and can define new methods or override existing methods to define new behavior not inherited from the parent class. See also inheritance.

A menu related to and reached from a main menu.

Equal distribution of tasks across multiple processors.

A mechanism for language-neutral, object-oriented programming in the OS/2 environment.