A plant is any place that turns one thing into another, at scale.
A waterworks, a smelter, a substation, a refinery, a dairy. Each one is
machines joined by pipes, cables and belts, and thousands of instruments measuring them
every second. Every reading arrives under a code. What the code means, which machine it
sits on and whether it can be trusted is written down somewhere else, if it is written
down at all.