You can get an 'ancient unix' source
license for $100. It gets you the
source to unix 7th edtion and earlier for personal use. 
 I *think* it might also give you rights to use 2.11BSD, the most recent
 BSD for pdp-11s, which also comes with source.  Best to contact PUPS
 to find out...
                                        Megan Gentry
                                        Former RT-11 Developer 
 
It does...
I'm waiting to order it all until I get some drive controllers
and disks for my new 11/23's.
Bill
---
  bpechter@shell.monmouth.com|pechter@pechter.ddns.org
      Three things never anger: First, the one who runs your DEC,
      The one who does Field Service and the one who signs your check.