Search across many disciplines and sources: peer-reviewed papers, theses, books, abstracts and articles, from academic publishers, professional societies, pre-print repositories, universities and other scholarly organizations.
Internet subject directories organize web sites into subject categories. Here are some examples you may want to check out:
InfoMine - a virtual library of Internet resources relevant to faculty and students at the university level
Intute - science, engineering and technology; arts and humanities; social sciences; health and life sciences
Science
Scitopia - search over 3.5 million documents, plus patents and government data
Science.gov - a gateway to over 50 million pages of authoritative selected science
information provided by U.S. government agencies, including research
and development results
WorldWideScience.org - a global science gateway--accelerating scientific discovery and progress
through a multilateral partnership to enable federated searching of
national and international scientific databases
TechXtra- search 4 million items in engineering, mathematics and computing from 31 top sources
Business
Biznar - a free, publicly available business search site that uses advanced technology to return high quality results
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