The Paley Center for Media reminds us that on this day in 1969 at 2230 PST, the first link was turned up between UCLAs Sigma 7 and SRIs 940.
A photo of the laboratory logbook is included in the Wikipedia article:
en.m.wikipedia.org/wiki/ARPANET
Cheers,
- jra
OMG: I didn't know that I've actually worked on one of the net's first machines. Though not at
the time, but a Sigma 7 at UCI in the late 70's.
Mike
crap, I'm supposed to be keeping a log book? No one told me... err do I have to log _EVERYTHING_ I do online? 
Happy Birthday, Internet!
Andrew
<sheldon>
In fact, not quite.
The birthday of the internet proper is generally held to be January 1, 1983, the flag day when tcp/ip was first deployed.
</sheldon>
It seems the Internet Society is going with October 29.
lo
Yikes! First it was the PDP in the British Museum and now a Sigma. I don't feel old enough for the museum...
Either does Ashworth.. 