Personal anecdote of the first message ever sent over the ARPANET "Doug Engelbart's Role in ARPANET History". Over the following years, the ARPANET grew from strength to strength, and in June 1974, less than five years after the first message was sent an astonishing 46 IMP’s had joined the network. This record is an excerpt from the "IMP Log" that was kept at UCLA. From UCLA: [Above] is a record of the first message ever sent over the ARPANET. The internet was born 50 years ago with a nonsense message. But 40 years ago Thursday, the first communication over a computer network called ARPANET was sent — a message that said simply "lo." The first transmission via the brand new Arpanet was sent on this date in 1969, but it didn't go as planned. 2008 "Internet Milestones: Timeline of Notable Internet Pioneers and Contributions" Timeline. The ARPANET and its successor, the Internet, had now been launched. The first successful message on the ARPANET was sent by UCLA student programmer Charley Kline, at 10:30pm on 29 October 1969 from Boelter Hall 3420. Many realize that 50 years ago, on October 29, 1969, the first message was successfully sent over the ARPANET, which eventually evolved into the Internet. Kline transmitted from the university's SDS Sigma 7 Host computer to the Stanford Research Institute's SDS 940 Host computer. Two characters – ‘L’ and ‘O’ – typed into a computer terminal at UCLA were successfully transmitted to a computer at the Stanford Research Institute, some 352 miles (566 km) away, before the connection was lost. It was sent by UCLA student programmer Charley Kline and supervised by Prof Kleinrock. Archived from But few know the story that led up to that message. On June 3, 1968, the ARPANET Program Plan was formally submitted to the U.S. Defense Department’s Advanced Research Project Agency (ARPA) by Larry Roberts.
"DARPA and the Internet Revolution". 50 years of Bridging the Gap. DARPA. It took place at 22:30 hours on October 29, 1969. Exactly 45 years ago -- on October 29, 1969 -- the first electronic message was sent between two computers. Tuesday marks the 50th anniversary of a milestone event that helped shape the modern Internet -- the first-ever electronic message sent over the Defense Department system, known then as ARPANET. The message was simply “Lo" instead of the intended word,"login."
On October 29, 1969, the first successful message was sent over ARPANET. On October 29, 1969, Professor Len Kleinrock and his team of graduate students at UCLA sent the very first message over a network of computers that would eventually become the internet. pp. UCLA student Charley Kline transmitted from an SDS Sigma 7 computer to an SDS 940 machine at the Stanford Research Institute. UCLA student Charley Kline attempts to transmit the text “login” to a computer at the Stanford Research Institute over the first link on the ARPANET, which was the precursor to the modern Internet.After the letters “l” and “o” are sent the system crashed, making the first message ever sent …

At 10:30 in the evening at the University of California, Los Angeles (UCLA) campus, the first message was sent over ARPANET, the forerunner of the internet. First ARPANET IMP log: the first message ever sent via the ARPANET, 10:30 pm PST on 29 October 1969 (6:30 UTC on 30 October 1969). The first ARPANET message sent using the prototype packet switching network was a failed attempt to simulate a basic login process. Special Series The Net At 40 The first message sent over the ARPANET was from Leonard Kleinrock’s UCLA computer by student programmer Charley Kline at 10:30 pm on October 29, 1969, to the second node at Stanford Research Institute’s computer in Menlo Park, California..

78–85. Waldrop, Mitch (April 2008).

UCLA student Charley Kline transmitted from an SDS Sigma 7 computer to an SDS 940 machine at the Stanford Research Institute. TIL Today 50 years ago the first message was sent over the ARPANET (Internet predecessor). The message being "LO", attempting to send "LOGIN" it crashed after the O.

October 29, 1969. This IMP Log excerpt, kept at UCLA, describes setting up a message transmission from the UCLA SDS Sigma 7 Host computer to the SRI SDS 940 Host computer.