What international organizations does Spain take part in?

You have the classic EU and UN. But they are also members of theADB (nonregional member), AfDB (nonregional member), Arctic Council (observer), Australia Group, BCIE, BIS, CBSS (observer), CE, CERN, EAPC, EBRD, ECB, EIB, EMU, ESA, FAO, FATF, IADB, IAEA, IBRD, ICAO, ICC, ICRM, IDA, IEA, IFAD, IFC, IFRCS, IHO, ILO, IMF, IMO, IMSO, Interpol, IOC, IOM, IPU, ISO, ITSO, ITU, ITUC, LAIA (observer), MIGA, MONUSCO, NATO, NEA, NSG, OAS (observer), OECD, OPCW, OSCE, Paris Club, PCA, Schengen Convention, SECI (observer), SICA (observer), UNCTAD, UNESCO, UNHCR, UNIDO, UNIFIL, Union Latina, UNRWA, UNWTO, UPU, WCO, WHO, WIPO, WMO, WTO, ZC according to the CIA Factbook.