How and when did the Internet appear?

The principles on which the Internet is built were first applied in the ARPANET network, created on October 29, 1969 by order of the American agency DARPA.

October 29, 1969 at 21:00 between two ARPANET nodes located at a distance of 640 km, held the first communication session. Namely, Charley Kline was trying to remotely connect from Los Angeles to a computer at Stanford. His colleague Bill Duvall (Bill Duvall) recorded all the actions taken (entering characters on the computer) over the phone. Interestingly, at 21:00 only two "LO" characters were entered. It was planned that Charlie Kline would enter the word LOGIN, but the network was cut off. After the ARPANET returned to service at 10:30 pm, the second attempt was successful. It was this experiment, in fact, that gave rise to the Internet.