Real-time Control System (RCS) is a reference model architecture, suitable for many software-intensive, real-time control problem domains. RCS is a reference model architecture that defines the types of functions that are required in a real-time intelligent control system, and how these functions are related to each other.

Real-time control system may refer to:

• Real-time Control System (RCS), a reference model architecture, suitable for many software-intensive, real-time control problem domains
  • Real-time Control System Software, a software system developed by NIST based on the Real-time Control System Reference Model Architecture
  • 4D-RCS Reference Model Architecture, an RCS application in the vehicle domain
  • ISAM Framework, an RCS application in the manufacturing domain
  • NASA/NBS Standard Reference Model for Telerobot Control Systems Architecture (NASREM), an RCS application in the space domain
• Control engineering, an engineering field focusing on digital control systems and real-time systems
• Embedded system, a computer system with a dedicated function within a larger mechanical or electrical system