[countbackula]

Admittedly I have 0 familiarity of the internals of a corporate electrical engineering environment, but this is a logically sound idea that in many other industries is standard. OS 10.02, Apache license v. 2, Archer router xyz Rev 02. What's the limiting factor here in the case of MCAS?

[karmelapple]

There are definitely different versions of software, each with unique identifiers, such as typical version numbers. There’s also the idea of “flight test ready” software, which is able to go onto a flight, vs software that is only to be used in a lab that is not truly flying in the air and controlling the plane.