AMPRNet: computer networks over amateur radio

A bit more information:

http://www.qsl.net/kb9mwr/wapr/tcpip/amprnet.html

"Back 1969, Norman Abramson launched Aloha Project at University of Hawaii. Motivated by the poor telephone lines in the Hawaiian Islands, funded by ARPA to investigate how to build a packet switched network based on fixed site radio links. At the University of Hawaii it was not really an option to use the PSTN or any form of cabling between Hawaii’s many islands. It opted instead to connect the seven colleges spread across four islands by the use of amateur radio. Norm performed a number of experiments around 1970 to develop methods to arbitrate access to a shared radio channel by network nodes. This system operated on UHF frequencies at 9600 baud. Abramson later developed a satellite version of ALOHAnet called PACNET."