AIO is an anthropological index to current periodicals in the the Anthropology Library at the British Museum (incorporating the former Royal Anthropological Institute library).

This historic journal index enables the simultaneous search in millions of citations for articles published in the arts, humanities and social sciences, across more than 300 years. It enables researchers quickly and comprehensively to identify articles relevant to their field of study and reduces what could take years of research to a matter of minutes. Journals indexed span 37 key subject areas and multiple languages.