1. An occurrence or happening of significance to a task or program, such as the completion of an asynchronous input/output operation. A task may wait for an event or any of a set of events or it may (request to) receive asynchronous notification (a signal or interrupt) that the event has occurred.

See also event-driven.


2. A transaction or other activity that affects the records in a file.

Last updated: 2000-02-09

Event Description Language



["EDL: A Basis for Distributed System Debugging Tools", P.C. Bates et al, in Proc Hawaii Intl Conf on Sys Sci, Jan 1982, pp.86-93].

Last updated: 2007-07-11



A kind of program, such as a graphical user interface, with a main loop which just waits for events to occur. Each event has an associated handler which is passed the details of the event, e.g. mouse button 3 pressed at position (355, 990).

For example, X window system and most Visual Basic application programs are event-driven.

See also callback.

Last updated: 2000-02-09

Nearby terms:

evaluatorEVEeventEvent Description Languageevent-driven

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