I will discuss the code, how I got such old and obscure code to run, as well as include snippets from my conversations with one of the original authors (who was very helpful in figuring some of this out). If all that wasn’t enough I managed to obtain the original PDP and VAX source code, it will be hosted here with permission. I want to give a huge thank you to Sjoerd Mullender and Don Libes for their assistance and permission in reproducing some of this material.

source: HN