👉 Controllers in computing, specifically within the context of software architecture and system design, are components or modules responsible for managing and coordinating the flow of data and control within a system. They act as the central hub or orchestrator, making decisions based on the current state of the system and executing commands to achieve specific goals or maintain desired behaviors. Controllers can handle tasks such as input/output operations, state management, resource allocation, and ensuring the proper sequencing of operations. They often integrate with other parts of the system, like user interfaces, databases, and external services, to ensure seamless interaction and efficient operation. In more complex systems, controllers can be distributed across multiple nodes or services, communicating through well-defined interfaces to maintain overall system coherence and responsiveness.