Teus Hagen

Teus Hagen (* 6 October 1945 in Wijnjeterp) is a Dutch Internet pioneer.

Biography Hagen started his career at the Computer Laboratory of the Mathematical Centre. Later, he initiated the Dutch and the European Unix User Groups NLUUG and EUUG (that became later EURopen). As chairman of EUUG, he started the European Unix Network (EUnet) in 1982 as the EUUG dial-up service. EUnet was the first public wide area network.

At the University of California, Berkeley, he started in 1983 working with TCP/IP. One of his team members, Daniel Karrenberg, is the author of the report in favor of TCP/IP for global networking in Europe. and Usenix for his open-source contributions and honoured as "Global Connector" in the Internet Hall of Fame in 2013.