Theater machinery refers to the various mechanical systems and equipment used in a theater to enhance performances. This includes items like stage lifts, trap doors, and fly systems, which allow for the movement of scenery and props. These mechanisms help create dynamic stage effects and facilitate quick scene changes during a production. Additionally, theater machinery encompasses lighting and sound equipment, such as spotlights and soundboards. These tools are essential for setting the mood and ensuring that the audience can hear the actors clearly. Together, these elements contribute to the overall experience of a theatrical performance.