Input-process-output (I-P-O) is a structured methodology ... both of which refer to the intended visual nature of the method. A simple example is shown below from healthcare research.

They process this input and the output unlocks our devices. Sensors are used to collect information automatically from the environment and use it as input for a computing device. Weather stations ...

This is another example of a simple output device ... does the reverse and ‘breaks’ the circuit. Process devices take the signal from the input stage of a system and act on it by changing ...