A control system is a device, or set of devices, that manages, commands, directs or regulates the behavior of other devices or systems. Industrial control systems are used in industrial production for controlling equipment or machines. The majority of control systems are computer-based.

A software program that is used to contact and get data from a Server software program either on the same computer or on another computer. A client makes a request and the server fulfills the request. An example of a client would be an e-mail program connecting to a mail server or an Internet browser client connecting to a web server.

An Allen-Bradley (Rockwell) family of PLC controllers, a very powerful, networked, and broad family.

Open network protocol which operates at a higher speed than DeviceNet but lower speed than Ethernet.