Glossary

allowed connection

In S/390 mode, in a director or switch, the attribute that when set, establishes dynamic connectivity capability. Contrast with blocked connection. See connectivity attribute. See also dynamic connectivity; unblocked connection.

allowed port connection

In S/390 mode, this attribute establishes dynamic connectivity capability.

alternating current

AC. Electric current that reverses direction at regular sinusoidal intervals (D). Contrast with direct current.

American National Standard Code for Information Interchange

ASCII. A standard character set consisting of 7-bit coded characters (8-bit including parity check) used for information exchange between systems and equipment (D).

American National Standards Institute

ANSI. A national organization consisting of producers, consumers, and general interest groups that establishes procedures by which accredited organizations create and maintain industry standards in the United States (A).

ANSI

See American National Standards Institute.

API

See application program interface.

application

(1)The use to which a data processing system is put, for example, a payroll application, an airline reservation application, or a network application. (2) A collection of software components used to perform specific types of work on a computer (D).

application client

The source object of the small computer system interface (SCSI) commands and destination for the command responses.

application program

(1)A program that is specific to the solution of an application problem. Synonymous with application software. (2) A program written for or by a user that applies to the user's work, such as a program that does inventory control or payroll. (3) A program used to connect and communicate with stations in a network, enabling users to perform application-oriented activities (I).

application program interface

API. A set of programming functions and routines that provides access between protocol layers, such as between an application and network services.