An index to tables of contents of more than 6,000 periodicals in the arts, humanities, and social sciences, published 1665-1995. Includes periodicals in English, German, Italian, French, Spanish, and other Western languages. Provides access, where available, to page images in the related Periodicals Archive Online (PAO). (When no corresponding text is available in PAO, an E-link is displayed.) PIO and PAO were once parts of a single database, called PCI Full Text.