Movie Projector
A movie projector is an opto-mechanical device for displaying moving pictures by projecting them on a projection screen. Most of the optical and mechanical elements, except for the illumination and sound devices, are present in movie cameras.
The future of movie projectors looks to change dramatically in the coming years. With significant advances in electronic storage mediums, film may not be used to show movies. In fact, some companies are working on a system by which movies are produced on computer hard drives. Stored in this way, movies promise to be much less expensive to distribute and display. Fewer workers could run movie theaters and the movie images will be much clearer and crisper. Currently, theaters are hesitant to adopt the new technology, but it is just a matter of time before computerized digital projectors replace movie film projectors.