Provides a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: peer-reviewed papers, theses, books, abstracts and articles, from academic publishers, professional societies, preprint repositories, universities and other scholarly organizations. Google Scholar helps you identify relevant material across the world of scholarly research.
An extremely diverse collection of more than 27,000 journal titles. The database contains both full-text and abstracts.
The major indexing and abstracting service for mathematical sciences and its applications. It covers the literature of mathematics since 1940. Abstracts Only.
Current Contents (Institute for Scientific Information)
Furnishes access to the bibliographic information on articles in journals and magazines and the table of contents of journals in the following fields: Biology, Chemistry, Geography, Geology and Physics. Coverage is 1998 to the present.
Association for Computing Machinery Digital Library (ACM DL)
Association for Computing Machinery Digital Library (ACM DL). The database comprehends the publications (except books) of the ACM. The latter touts itself as the worlds leading educational and scientific computing society.