Instrumentation and control in other industries, is just instrumentation like pressure transmitters, flow, temperature etc. and how to control a process, like a chemical mixing process or recipe if you will. Like I have been and IE (instrument electrician) and I currently(at least for a couple more weeks) train instrument electricians.
It seems that maybe I&C techs are just electronics guys(navy et's) but maybe the same? Am I wrong about that?