Invisible Web Databases

  • What Is the Invisible Web? How Can You Search It? Why Would You Want To?

    Invisible Web graphic of boy in fog

    Many databases comprising the Invisible Web are not indexed by search engines like Google. These are some valuable research databases you may want to search directly:

    1. Directory of Open Access Journals
      This service covers free, full text, quality controlled scientific and scholarly journals and aims to cover all subjects and languages.
    2. FindArticles
      Choose “Free articles only” to search for articles from academic, industry and general interest publications.
      Browse categories or use a search engine to find freely accessible magazine articles on the Web.
    4. PubMed
      The U.S. National Institutes of Health (NIH) free digital archive of biomedical and life sciences journal literature.
    5. HighWire Press
      Hosts the largest repository of free full-text life science articles in the world. Those available at a charge may be obtainable via Interlibrary Loan.
    6. On-line Encyclopedia of Integer Sequences
      Type in a series of numbers and this database will complete the sequence and provide the sequence name, along with its mathematical formula, structure, references, and links.
    7. NatureServe Explorer
      An authoritative source for information on more than 65,000 plants, animals, and ecosystems of the United States and Canada.
    8. The Online Books Page
      Over 25,000 books freely readable on the Web.

    9. The Open Library
      Shows a way that books CAN be represented online. Part of “The Million Books Project.”
    10. The Internet Archive
      A digital library of Internet sites and other cultural artifacts in digital form. This is an attempt to make all the published works of humankind available to everyone in the world! Besides accessing texts, moving images, audio and live music, visitors to the Wayback Machine can even type in a URL, select a date range, and then begin surfing on an archived version of the Web!
    11. Google Books
      Search and preview millions of books from libraries and publishers worldwide using Google Book Search. Discover a new favorite or unearth an old classic.
    12. Project Gutenberg
      Provides over 19,000 free ebooks, all of which are in the public domain (either copyrights have expired or copyright holder has given permission).

    13. ERIC — Education Resources Information Center
      This is the world's largest digital library of education literature.