[COFF] ARPAnet now 4 nodes

The ARPAnet reached four nodes on this day in 1969; at least one "history" site reckoned the third node was connected in 1977 (and I'm still waiting for a reply to my correction). Well, I can believe that perhaps there were only three left by then... According to my notes, the nodes were UCSB, UCLA, SRI, and Utah. -- Dave