History and Philosophy of Science and Technology 

Authoritative biographies, including references, of deceased scientists from all periods of science from classical antiquity to modern times.

Simultaneous searching of Historical Abstracts (index to articles from 1955 on for the history of the world exculding US and Canada from 1450 to present) and America: History and Life (articles from 1964 on for US and Canadian history)

Index to articles from bibliographies in ISIS, Technology and Culture, Current Work in the History of Medicine, and Bibliografia Italiana di Storia della Scienza.

Doctoral dissertations from North American institutions, with links to full text.

A combined index to Web of Science (Science Citation Index, Social Sciences Citation Index, Arts & Humanities Citation Index), Conference Proceedings Citation Index, Derwent Patent Index, and Medline.