Wow you where at Bell Labs! That must have been quite something. Always feels like all computer history reaches back to Bell Labs or Xerox Parc.
What made that place special? Was it obvious to you when you where there that it was special? Or was it something you can see in retrospect?
How did you write that 26,000 lines C and assembly program? Did you use interactive video displays then or was it more like teletypers?
Today one can often just start typing and changing code as you go, but I assume back then you may have need a bit more planning on paper first? How exactly was the development process?
I don't think I ever used CP/M. Earliest systems I used was Commodore 64, and I don't know what they really ran as I was an elementary school kid interested in playing video games.
I think I mentioned my first computer was an Amiga 1000, so the era that came before that I was mainly exposed to through stories in old magazines and discussion of computer history.