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IEEE Xplore. Delivering full text access to the world

Providing researchers with access to millions of scientific documents from journals, books, series, protocols and reference works.

Provides simple, accurate and reliable identification, authentication and authorization solutions using the latest biometric technology, for businesses and end-users, to enhance their security.

Academia.edu helps academics follow the latest research.

InTechOpen offers thousands of peer-reviewed free Open Access academic and scholarly articles and research papers. InTechOpen is part of InTech - Open Access Publisher...

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HowStuffWorks Science has explanations and colorful illustrations related to earth science, life science, and other wonders of the physical world.

Purplemath contains practical algebra lessons demonstrating useful techniques and pointing out common errors. Lessons are written with the struggling student in mind, and stress the practicalites over the technicalities. Links and other resources als...

www.acm.org - The premier society in computing brings you the Computer Portal.

Hindawi is a rapidly growing academic publisher with more than 200 Open Access journals covering a wide range of academic disciplines.