lol, essentially yes. sorry about that. there's a lot of regulations around software that's used for aerospace and defense, and that's where a lot of the new builds are happening these days. but here's a little decoder ring:

ERP: the core system that manages/plans everything from accounting to inventory MES: the shop floor QMS: the quality system that keeps track of what's went wrong and how we're fixing it CMMC: government regulation NIST 800-171: spec that drives the regulation