If this sort of computing history interests you, I just finished reading, "Hot Tech, Cold Steel" https://www.amazon.com/Tech-Cold-Steel-Computer-Aided-Manufa...

It's interesting how the company, MDSI, started on 8-bit timeshared mainframes, then eventually ported their software to newer platforms using a combination of emulation and microcoding.

I happen to know Chuck from my years racing solar cars in college.

Chuck actually recently published a book, documenting his career within CNC machining. He started a company whose product became the gold standard for CNC software for decades.

https://www.amazon.com/Tech-Cold-Steel-Computer-Aided-Manufa...