The responses to my previous post, on the myth of the fall, brought out a lot of half-forgotten lore about pre-open-source cultures of software sharing.
Some of these remain historically interesting, but hackers talking about them display the same tendency to back-project present-day conditions I was talking about in that post. As an example, one of my regular commenters inferred (correctly, I think) the existence of a software-sharing community around ESPOL on the B5000 in the mid-1960s, but then described it as “proto-open-source”
I think that’s an easy but very misleading description to land on. In the rest of this post I will explain why, and propose terminology that I think makes a more useful set of distinctions. This isn’t just a historical inquiry, but relevant to some large issues of the present and future.