Gösta Grahne, Universite de Paris Sud, Centre d'Orsay, 5/96
Roope Kaivola, University of Edinburgh, 10/92-12/95
Pekka Kilpeläinen, University of Waterloo, Canada, 8/93-8/94
Jyrki Kivinen, University of California at Santa Cruz, U.S.A., 1/93-12/94 and 5/95-7/95
Heikki Lokki, University of Missouri, St. Louis, and Webster University, St. Louis, Missouri, U.S.A., 7/93-5/95
Heikki Mannila, Max Planck Institut für Informatik, Saarbrücken, Germany, 9/95-7/96
Petri Myllymäki, Royal Holloway and Bedford New College, University of London, UK, 3/95-7/95.
Pekka Orponen, Technische Universität Graz, Austria, 9/94-7/95
Jukka Paakki, Technical University of Munich, Germany 2/96-3/96
Jorma Tarhio, University of California at Berkeley, U.S.A., 7/93-7/94
Martti Tienari, University of British Columbia, Vancouver, Canada, 5/94-7/94
Esko Ukkonen, University of Bielefeld, Germany, 10/94-11/94