The Semi Automatic Ground Environment (SAGE) program consisted of networked country-wide radar systems together for the first time.
beginning of the Advanced Research Projects Agency Network (ARPANET) which was one of the key networks which our Internet today was based off of.
Vinton Cerf and Robert Kahn developed the first description of the TCP protocols (covered more deeply in the Introduction to Networking lesson
The term “Internet” was first used in 1974 to describe a single global TCP/IP network detailed in the first full specification of TCP written by Cerf and his colleagues.
The first TCP/IP-wide area network was created on January 1, 1983 when all hosts on the ARPANET were switched over from the older protocols to TCP/IP.