A Distributed Control System (DCS) is a type of automated control system that manages processes across multiple locations. Unlike centralized systems, where a single controller oversees everything, a DCS uses several controllers distributed throughout the system. This setup enhances reliability and allows for better management of complex processes, such as those found in manufacturing or power generation. In a DCS, each controller can operate independently while still communicating with others, ensuring coordinated control. This design improves system resilience, as a failure in one part does not compromise the entire operation. Common applications of DCS include oil refineries, chemical plants, and water treatment facilities.