All, In the same vein as my prior note, I have made a note available on the process of getting up and running on Unix Seventh Edition in a SimH PDP-11 environment. The text is located at: http://decuser.blogspot.com/2015/12/installing-and-using-research-unix.html I welcome comments, suggestions, and even criticisms. While I have learned a lot since my last blog entry (many thanks to Hellwig Geisse, Nelson Beebe, Noel Chiappa, Clement Cole and several others), I am still learning about these environments. I originally invested time in getting v7 running so that I could more easily work with v6, after having gone there, I believe that it was time very well spent. I know a lot more about special devices, tape formats, and so on than I did before as a result of taking the fork in the road. Thanks for everyone's help. Oh, and by the way, there appears to be quite a bit of active interest in this topic - the blog post has been viewed several thousand times since I posted it, two weeks ago. Kind regards, Will