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Yahoo! Answers is a new way to find and share information. You can ask questions on any topic, get answers from real people, and share your insights and experience.

Scribd is a social publishing site, where tens of millions of people share original writings and documents. Scribd

Quizlet is a lightning fast way to memorize vocabulary lists. It

Interactive Open Source Numerical Library of C/C++ functions for Engineering, Finance, Maths, Science and Statistics. With Online Calculators for Numerical Components and Excel Add-ins.

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