3 \+Permanent staff \+ Dr. J. Engelfriet & &RUL \+ Dr. H.J. Hoogeboom & &RUL \+ Dr. H.C.M. Kleijn & &RUL \+ Prof.dr. G. Rozenberg & &RUL
\+Ph.D. students \+ drs. T. Gelsema & &RUL \+ drs. J. Hage & &RUL
\+CWI participants \+ Prof.dr. J.W. de Bakker \+ Dr. J.J.M.M. Rutten