It is most notable for being one of the first examples in which film and video technologies were combined.

It was inevitable that personal computers would become a medium for sexually explicit material, just as print, film and video technologies did before them.

Increasingly, Mr. Lucas sees it as his job to raise the quality and push the boundaries of film and video technology.

Currently on view indefinitely is "Creating a Collection: Film and Video Technology," almost 1,000 pieces of amateur and professional production equipment, including motion-picture cameras and projectors, and sound and editing equipment.

Visitors will learn about the film and video technology often used in shows, and they will also have a glimpse of two exhibitions now under construction, the Hall of Human Biology and Evolution, scheduled to open in the fall of 1992, and the proposed renovation of the fourth-floor hall of dinosaurs.