A Symposium on "Combinatorial Structures and their Applications" was held at
Villa Madruzzo (Cognola di Trento), on October 20 - 25, 1980. The meeting was promoted
and sponsored by the "Centro Interuniveritario per la Ricerca Matematica"
(C.I.R.M.) of the "Universita di Trento" for the purpose of offering an intense
week of joint scientific activity to some outstanding scientists and a group of
younger researchers. The enthusiastic co-operation of all participants made the
Conference a great success.