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General Reference

Art Cyclopedia:

Has indexed 1,200 art sites and offers more than 32,000 links directly to an estimated 100,000 works by over 7,500 artists.

Encyclopedia on Earth:

The Encyclopedia of Earth (EOE) is an electronic reference about the Earth, its natural environments, and their interaction with society. The content is presented in a style intended to be useful to students, educators, scholars, professionals, as well as to the general public.

Encyclopedia of Life:

The Encyclopedia of Life (EOL) brings together information about all life on Earth—one web page for each species. EOL is much more than 1.9 million species pages. It's an incredible resource for text, images, video, sounds, maps, classifications and more.

Encyclopedia of Mathematics:

The Encyclopedia of Mathematics (EOM) Wiki is an open access resource designed specifically for the mathematics community. With more than 8,000 entries, illuminating nearly 50,000 notions in mathematics, the EOM was the most up-to-date graduate-level reference work in the field of mathematics.

Google Scholar:

Provides a search of scholarly literature across many disciplines and sources, including theses, books, abstracts, and articles.


Free, authoritative, and respected reference for Internet users, provides a comprehensive encyclopedia, almanac, atlas, dictionary, and thesaurus.


Features a searchable, subject-categorized directory of authoritative websites; links to online texts, newspapers, and magazines.

OCLC’s WorldCat:

WorldCat is a global network of library content and services that uses the Web to let your institution be more connected, more open, and more productive.

Other Library Holdings:

If you cannot find what you are looking for in the PMU Libraries online catalog, try search KFUPM Library holdings.

Probert Encyclopedia:

Is an extensive free online encyclopedia and dictionary of over 300,000 cross- referenced and interlinked topics with over 16,000 photos and illustrations and over 2000 maps, specializing information not found in other encyclopedias and dictionaries.


Free and family friendly web site that indexes and reviews quality, credible and current web-based reference resources.


Is a peer-reviewed open-access encyclopedia written and maintained by scholarly experts from around the world. Scholarpedia is inspired by Wikipedia and aims to complement it by providing in-depth scholarly treatments of academic topics.


Find high-quality statistics, surveys and studies from over 18,000 sources on the internet's leading statistics database.


Is a general/global encyclopedia that contains high-quality knowledge data covering all the fields and areas in the Arab world. TAGEPEDIA is an abbreviation for Talal Abu Ghazaleh ENCYCLOPEDIA. TAGEPEDIA is a knowledge sharing system that is based on an open source methodology with a totally free access.


THOMAS was launched in January of 1995, at the inception of the 104th Congress. The leadership of the 104th Congress directed the Library of Congress to make federal legislative information freely available to the public. Since that time THOMAS has expanded the scope of its offerings to include: Bills, Resolutions, Activity in Congress, Congressional Record, Schedules, Calendars, Committee Information, Presidential Nominations, Treaties, Government Resources, For Teachers.