Above, is the log book from UCLA documenting the first host-to-host connection of the ARPANET, the precursor to our modern internet. It was 10:30pm on October 29, 1969. The first message ever sent? "LO." They were trying to type LOGIN, but it crashed before they could finish.
For something as ubiquitous as the internet today, it certainly isn't easy to find where it all started. I don't mean historically, I mean logistically: 3420 Boelter Hall is a tiny room in a basement hallway of a large nondescript building on the sprawling UCLA campus.