On October 29, 1969, ARPAnet Advanced Research Projects Agency Network, delivered its first message: a “node-to-node” communication from one computer to another. The first computer was located in a research lab at UCLA and the second was at Stanford; each one was the size of a small house. ARPAnet was originally funded by the U.S. Department of Defense, ARPAnet used packet switching to allow multiple computers to communicate on a single network.
UUCP was first developed by Bell Laboratories in 1977 for communication between their Unix development sites. In mid-1978, this network already connected over 80 sites. It was running email as an application, as well as remote printing. However, the system’s central use was in distributing new software and bug fixes.