Ciao :: Columbia International Affairs Online This link opens in a new windowColumbia International Affairs Online (CIAO) is designed to be a comprehensive source for theory and research in international affairs. It publishes a wide range of scholarship from 1991 on that includes working papers from university research institutes, occasional papers series from non- governmental organizations, foundation-funded research projects, and proceedings from conferences. It also has more than 160 links to international affairs centers, institutes, and resources; U.S., international, and foreign govenment sites; environmental studies Web pages; and news media services.