A PLC is an industrial computer control system that continuously analyzes the status of input devices and makes choices to manage the state of output devices based on a bespoke program. A PLC’s job is to govern the functioning of a system using the underlying logic that has been programmed into it. PLCs are used by businesses all over the world to automate their most critical procedures. A PLC receives inputs from both automated data collection points and human input points such as switches or buttons.