Comment by jmclnx

IN 1995, I think there were some proprietary offerings, one company in Massachusetts was purchased by IBM back then.

But on the minis (non-DEC) I worked on back then, there was nothing. We kept a specific drive that had source current source, but once in production you just copied the change version to that drive, replacing what was already there. As you can guess, changes disappeared often :) And there was no change history, but we would tag each line changed with our 3 character ID.