Hubert Zimmermann (1941 – November 9, 2012) was a French software engineer and a pioneer of computer networking.
Zimmermann was educated at École Polytechnique and École Nationale Supérieure des Télécommunications. His career began at Institut National de Recherche en Informatique et Automatique (INRIA) in Rocquencourt from 1972 through 1979, where he led research into what became ChorusOS series of distributed operating systems. He participated in the International Networking Working Group from 1972, initially chaired by Vint Cerf. He was acknowledged by Bob Kahn and Cerf in their 1974 paper on internetworking, "A Protocol for Packet Network Intercommunication". In 1977, he was an early member of the International Organization for Standardization as it developed the Open Systems Interconnection protocols.
He then worked for France Télécom in 1980 through 1986. He developed and promoted the OSI reference model which became a popular way to describe network protocols, and published a paper on the model in 1980 and one with John Day in 1983. He founded Chorus systems in 1987, purchased by Sun Microsystems in 1997, where he was director of telecom software engineering for 5 years. Then he invested in entrepreneurial high-tech companies such as Arbor Venture Management, Boost Your StartUp, Gingko Networks and UDcast.
On 9 November 2012, Zimmermann died in France.
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The authors wish to thank a number of colleagues for helpful comments during early discussions of international network protocols, especially R. Metcalfe, R. Scantlebury, D. Walden, and H. Zimmerman; D. Davies and L. Pouzin who constructively commented on the fragmentation and accounting issues; and S. Crocker who commented on the creation and destruction of associations.
- Hubert Zimmermann (April 1980). "OSI Reference Model—The ISO Model of Architecture for Open Systems Interconnection". IEEE Transactions on Communications. 28 (4): 425–432. doi:10.1109/TCOM.1980.1094702.
- John D. Day; Hubert Zimmermann (December 1983). "The OSI reference model". Proceedings of the IEEE. 71 (12): 1334–1340. doi:10.1109/PROC.1983.12775.
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- Michel Gien, forwarded by John Day (11 November 2012). "Very Sad News". Internet History Mailing list. Retrieved 30 July 2013.