HEATKEYS

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

International führender Wissenschaftsverlag - Wissenschaft, Technik, Medizin, Architektur, Wirtschaft und Verkehr - Zeitschriften, Bücher und EContent.

Wolfram|Alpha gives you access to the world

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.

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

Founded in 1995, GameFAQs has over 40,000 video game FAQs, Guides and Walkthroughs, over 250,000 cheat codes, and over 100,000 reviews, all submitted by our users to help you.

Wolfram Mathematica Online Integrator -- free integration answers

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

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

Explore the updated online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of articles, biographies, videos, images, and web sites.

The authoritative Collins dictionaries now available online. Search amongst hundreds of thousands of words and expressions in Spanish, French, German, Italian, Chinese, Portuguese, Russian and synonyms dictionaries.