OAIster is a union catalog of digital resources. These digital resources can range from an old-time advertisement of electric refrigerators (from the Library of Congress American Memory project) to Harriet Beecher Stowe's memoirs (from the University of Michigan). The sources include digitized books and articles, audio files (e.g. wav, mp3) images (e.g. tiff, gif) movies (e.g. mp4, quicktime) and datasets (downloadable statistics files). The digital resources available on OAIster are hidden from search engines and are part of the "deep web" which allows users to search repositories, often located at universities.

Google Scholar   

A good source of scholarly articles, Google Scholar has digitized not only books, but peer-reviewed journals. If you need help finding the full-text article, see Ms. McEnery, the librarian.

ArXiv

ArXiv (pronounced "Archive") is an e-print archive on the Cornell University Library site that contains over 100,000 articles in physics, 10,000 articles in mathematics and 1000 articles in computer science, as well as articles in quantitative biology and statistics. Use this site to locate primary source research literature.

CODA (Caltech Collection of Open Digital Archives)

Use this site to find electronic theses, technical reports, books, conference papers and oral histories.