Periodicals Archive Online is a major archive that makes the backfiles of scholarly periodicals in the arts, humanities and social sciences available electronically, providing access to the searchable full text of hundreds of titles. The database spans more than two centuries of content, 37 key subject areas, and multiple languages.

Currently, Periodicals Archive Online contains over 700 journals comprising more than 3 million articles and 15 million article pages. Periodicals Archive Online continues to add new titles, to give undergraduate and graduate students, university faculty and libraries access to a growing collection of key journals in the humanities and social sciences.