BBN did a second release that used the sockets. At Stellar we used that stack, not the UCB stack, since we were taking System V and adding BSD to it. Since the author of the BBN stack (Rob Gurwitz) was with us, it was felt that the BBN stack was actually better in many ways. In particular, we had a parallel machine and it was felt that the BBN stack would be easier/cleaner to multi-thread.

I can ask around, I lost track of the code base after Stellar. tjt might still know.

On Wed, Nov 26, 2014 at 1:35 PM, Dan Cross <crossd@gmail.com> wrote:

On Wed, Nov 26, 2014 at 1:24 PM, Clem Cole <clemc@ccc.com> wrote:
[snip] The MIT guys did ARP for ChaosNet which quickly migrated down the street to BBN for the 4.1 IP stack. Remember that BBN had the contract to do IP for UNIX and that was the stack a number of us ran on our Vaxen for long time [IIRC - Sam actually did the routed and rcp stuff which the BBN stack, before Joy had rewritten it - created the sockets interface etc].

This brings up something I've been meaning to ask about for a while now. Whatever happened to the BBN stack after the BSD stack became dominant? Is any of the code still available anywhere?