Remote terminal units (RTUs) connect directly to sensors, meters, dataloggers or process plants, and collect and transmit data automatically.

Distributed and supervisory control systems (DCS / SCADA) are system architectures for process control applications

Distributed control systems (DCS) use decentralized elements or subsystems to control distributed processes or complete manufacturing systems

Human machine interfaces (HMI) are operator interface terminals with which users interact in order to control other devices

Supervisory control and data acquisition (SCADA) systems are large-scale, industrial control and measurement systems that consist of a central host, one or more remote units, a communications network, and specialized software

Microcontrollers (MCU) are complete computer systems on a chip.

Motor controllers receive supply voltages and provide signals to motor drives that are interfaced to motors.