The Full Form of CIAO is‍ Columbia International Affairs Online.

Columbia International Affairs Online (CIAO) is the world’s largest online resource of documents and articles devoted to research, analysis, and scholarship on international politics and related fields, including security studies, global finance, diplomatic practice, humanitarian law, global governance, development studies, and environmental studies.

With more than 500,000 pages aggregated from 300 international publishing institutions, CIAO is a unique and valuable archive and cross-searchable library of full-text articles from government research organizations, independent think tanks, university analysis centers, and scholarly journals.

The material in CIAO encompasses working papers, policy briefs, and current analysis and commentary, as well as scholarly journal articles, e-books, and videos. The Economist Intelligence Unit supplies comprehensive country surveys, including in-depth political and economic data and detailed maps.

Nearly 500 institutions currently subscribe to CIAO. University libraries, high schools, government agencies, and global research institutions all benefit from this ever-growing resource with more than 40,000 new pages added each year.