Yup, the $100 license gives you rights to any AT&T PDP-11/16-bit Unix as well as AT&T Unix 32V. This, combined with Berkeley's liberal license gets you rights to any BSD Unix, be it 2.x BSD or 4.x BSD for the VAX, etc. The PDP-11 archive CD-ROM is about $5, and you can get the complete Berkeley archive (less 2.11 BSD, but everything else) for $100. You might be able to get the 4.x BSD software elsewhere for less, but you still have to have the Ancient Unix license or be covered by another AT&T license to get the source code. The only thing you can't get is anything beyond System III (i.e., System III is included), or anything that has another party's (other than Berkeley's) intellectual rights integrated unless that additional party also gives you a license. For example, you probably can't get source code to any version of Xenix because Microsoft and SCO aren't likely to release it. Dave Megan wrote: