A flowchart is a diagram of a process, using standard symbols to represent a variety of process activities over a specified timeline. Frank and Lillian Gilbreth introduced the “flow process ...

Process devices take the signal from the input stage of a system and act on it by changing it in some way. Transistors are an example of a processing device, and are a special type of switch.

Mechanical devices can change one form of force to another. All moving parts work on some sort of mechanism. Mechanical systems all involve an input, a process, and an output.