The Official Birthday of The Internet
Dozens of pioneering scientists, programmers, and engineers have contributed to the technology we now recognize as the Internet. The existence of worldwide networks of information was recognized in the early 1900s, and the first schematics for the internet arrived in the early 1960s, with the idea of an “Intergalactic Network” of computers. Still, the creation of ARPANET marked the first workable prototype of the Internet in the late 1960s, enabling multiple computers on one network to communicate. ARPANET sent its first message, “LOGIN,” a node-to-node communication from one computer to another, on the 29th of October, 1969. However, only the first two letters arrived. The Transmission Control Protocol and Internet Protocol, or TCP/IP, by scientists Robert Kahn and Vinton Cerf, also played a crucial role in the growth of the technology, setting the standard for how data could be transmitted between multiple networks. However, it was not until the 1st of January, 1983, that ARPANET adopted TCP/IP and began to assemble the “network of networks,” i.e., the modern Internet.
Source: https://en.wikipedia.org/wiki/History_of_the_Internet