DCC Programming, or Digital Command Control Programming, is a method used in model railroading to control trains digitally. It allows multiple trains to operate independently on the same track by sending digital signals through the rails. Each train is equipped with a decoder that interprets these signals, enabling precise control over speed, direction, and lighting. This system enhances the realism of model railroads, as operators can easily manage complex layouts without the need for complicated wiring. DCC also supports various accessories, such as switches and signals, making it a versatile choice for hobbyists looking to create dynamic and interactive train setups.