3420 Boelter Hall, UCLA: the birthplace of the internet

3420 Boelter Hall, UCLA, Los Angeles is the original location of the first ARPANET node. UCLA professor Leonard Kleinrock and his team used the Interface Message Processor (IMP) [seen on the right of the photo], the packet-switching node used to interconnect participant networks to the ARPANET to send the first message, the letters LO to Stanford Research Institute on 29th October 1969.