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Internet Archive is a non-profit digital library offering free universal access to books, movies & music, as well as 150 billion archived web pages.

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

LinkedIn strengthens and extends your existing network of trusted contacts. LinkedIn is a networking tool that helps you discover inside connections to recommended job candidates, industry experts and business partners.

An index of current online research in Philosophy. Also contains bibliographies, discussion forums, and advanced research tools for researchers.

Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with friends, upload an unlimited number of photos, post links and videos, and learn more about the people ...

from News-Medical.Net - Latest Medical News and Research from Around the World

Twitter is without a doubt the best way to share and discover what is happening right now.

Piazza is a free online gathering place where students can ask, answer, and explore 24/7, under the guidance of their instructors. Students as well as instructors can answer questions, fueling a healthy, collaborative discussion.