Most are free, but some are fee-based or available only on campus. Arranged by subject, with sections on the arts and humanities, sciences and technology, and social sciences. Searchers can also browse individual issues of Population Index from 1986 on . There is a Boolean keyword search for archived columns, and also a browseable list . World Wide Web Virtual Library Diffuse and wide-ranging site directory organized by subject.
Users can browse subjects alphabetically or search by subject keyword .