" Event driven means it spends much of its time waiting for an event and then takes action if and when an event occurs. Contrast this with some programs that do not respond to events at all, but simply do their job and terminate . For example, an operating system command to display the current time. It displays the time and is done; it does not wait for events. For more information, see: Event-driven_programming Implementations The pattern was first described in 1979 by Trygve Reenskaug, then working on Smalltalk at Xerox research labs. This original implementation inspired many other GUI frameworks such as: The NeXTSTEP and OPENSTEP development environments encourage the use of MVC. Cocoa, based on these technologies, also uses MVC. Piper Cub Model Airplane Microsoft Foundation Classes (MFC). The Java Swing GUI library. "

" (Eds. ) Professional knowledge management; LNCS 3782 Springer Verlag; 2005. Models as people artist model — in art school modeling, a person who poses for purposes of art. model — person whose occupation is to display clothing (eg. a "fashion model") or other personal items of artistic or aesthetic value, and who is often physically attractive; a model who attains celebrity status or is otherwise widely known is said to be a "supermodel". promotion model— promotes a product or service role model — person who acts as a behavioural or moral example to others. Models as physical objects physical model — physical representation of an object; in engineering, similitude is used in the scientific testing of physical models. Rc Model Airplane Plan scale model — a replica or prototype of an object built as a hobby or for research. a particular version of a series of vehicles produced by an automobile manufacturer is known as a model. "