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

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Find what you want in a library near you with WorldCat, a global catalog of library collections.

YouTube is a place to discover, watch, upload and share videos.

Community forum for tinnitus sufferers around the world. Topics range from general support, treatments, success stories, tinnitus masking to hearing protection and medical research.

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

Business networking for professionals on XING! Connect to business partners and find jobs, colleagues and employees. Start networking!

Online shopping from the earth's biggest selection of books, magazines, music, DVDs, videos, electronics, computers, software, apparel & accessories, shoes, jewelry, tools & hardware, housewares, furniture, sporting goods, beauty & person...

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 ...