• Compendex/INSPEC

• INIS-International Nuclear Information System - INIS responds to the information needs of the international community and reflects the IAEA's interests and activities on peaceful applications of nuclear science and technology.
• DOE Information Bridge - The Information Bridge: DOE Scientific and Technical Information provides free public access to full-text documents and bibliographic citations of Department of Energy (DOE) research report literature. Documents are primarily from 1991 forward and were produced by DOE, the DOE contractor community, and/or DOE grantees.
• ETDEWEB - ETDE World Energy Base (ETDEWEB) contains a growing collection of over 4,106,000 bibliographic records and more than 237,000 full text documents! Access to additional full text documents is provided by DOI links.
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• Compendex - Engineering and related disciplines.
• INSPEC - Communications, Computers & Computing, Control Engineering, Electrical Engineering, Electronics, Information Technology, Physics.
• Technology Research Database - A comprehensive database which provides a single file for searching all fields of Engineering and Technology.

• Applied Science and Technology Abstracts / Full Text - Industrial and mechanical arts topics. *Partial full-text coverage available in OmniFile Full Text.
• Aerospace and High Technology Database - Aeronautics, Astronautics, Space Sciences, and supporting fields.
• ACM Digital Library - The ACM DL is a vast collection of citations and full text from ACM journal and newsletter articles and conference proceedings.
• IEEE Xplore - Full-text of IEEE journals, conferences and standards.
• SPIE (International Society for Optical Engineering) - SPIE Digital Library is an extensive resource on optics and photonics, providing more than 230,000 technical papers from SPIE Journals (dates vary) and Conference Proceedings (1990 - present).
• Materials Research Database with METADEX - A combined file which brings together the majority of the leading materials science databases, with specialist content on materials science, metallurgy, ceramics, polymers, and composites used in engineering application.
• MEDLINE - Medicine, dentistry, nursing, and related disciplines.
• TOXLINE - Toxic substances - chemicals and pharmaceuticals, pesticides, environmental pollutants, and mutagens and teratogens.
• SciFinder Scholar (Chemical Abstracts) - Chemical and related scientific information.
• ERIC (EBSCO Software) - The major database indexing books and articles in the field of education and providing some full text since 1992.
• Web of Science - Bibliographic information, author abstracts, and cited references and related references covering the sciences, social sciences, and arts & humanities.

Here's a way to include a link to Purdue Library holdings from Google Scholar. The OpenURL referrer put the Find It @ Purdue icon in your Google Scholar search results, allowing for quick, easy determination if you can get an electronic copy of an article.
     http://www.openly.com/openurlref/