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Arpanet
Arpanet was the first real network to run on packet switching technology (new at the time). On the October 29, 1969, computers at Stanford and UCLA connected for the first time. In effect, they were the first hosts on what would one day become the Internet. The first message sent across the network was supposed to be "Login", but reportedly, the link between the two colleges crashed on the letter "g". -
Unix
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Arpanet Network
An Arpanet network was established between Harvard, MIT, and BBN (the company that created the "interface message processor" computers used to connect to the network) in 1970. -
E-Mail
Email was first developed in 1971 by Ray Tomlinson, who also made the decision to use the "@" symbol to separate the user name from the computer name (which later on became the domain name). -
The beginning of TCP/IP
1974 was a breakthrough year. A proposal was published to link Arpa-like networks together into a so-called "inter-network", which would have no central control and would work around a transmission control protocol (which eventually became TCP/IP).
