Correspondence, circulars, agenda, proceedings, resolutions and reports relating to congresses 1946-1993; correspondence, circulars, agenda, minutes and resolutions relating to the meetings of the Executive Committee 1947-1994, the Bureau and the Presidium 1946-1994; correspondence and circulars 1946-1994; reports of the General Secretariat 1947-1967; files on the European Community and the Council of Europe 1951-1991, the European Youth Centre 1971-1989, the European Youth Foundation 1974-1988, the European Youth Forum 1975-1991, the Socialist International 1947-1988, the World Federation of Democratic Youth (WFDY) 1958-1991, the International Union of Students (IUS) 1956-1988 and other international organizations; files on the Feminist Working Group 1984-1994 and other commissions and working groups of the IUSY; files on camps, festivals, seminars and summer schools of the IUSY and other organizations 1947-1995; files on contacts with national and regional organizations in Africa, America, Asia, Australia and the Pacific, and Europe 1946-1995; files on disarmament and employment 1975-1988, human rights 1973-1989 and multinationals 1972-1975. Additional documents from Walther (Euregionales Freizeit- und Informationswerk für Jugendarbeit e.V.) 1965-1969. Documents relating to congresses 1996-2000, meetings of the Bureau and the Presidium 1994-1998, meetings of the IUSY Asia-Pacific Committee in Manila 1997 and the IUSY African Committee in Libreville, Gabon 1998; files on contacts with national and regional organizations in Africa, America, Asia, Australia and the Pacific and Europe 1992-1996. The 2012 accrual contains paper documents but also a lot of audiocassettes and diskettes from the nineties. Accrual 2022 from Ricard Torrell i Blanquer: Digital copies of the activity reports by the president of the IUSY Roger Hällhag 1991-1995.