HEATKEYS

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...

AbeBooks is your source for Used, New, Rare and Out of print books. Find classic collectibles, rare signed editions, used textbooks, and inexpensive bestsellers from independent booksellers worldwide.

New! Lower Prices on Millions of Books, DVDs, Music, Toys & Games and More. Shop for eBooks, NOOK, and textbooks. FREE Shipping on $25 orders!

Trade books for free with our online book swap. We are not just Paperbacks! Find a huge selection of hardbacks, audio books, romance novels and more.

Buy and sell electronics, cars, clothing, apparel, collectibles, sporting goods, digital cameras, and everything else on eBay, the world

Patent directory service

Science.gov is a gateway to government science information provided by U.S. Government science agencies, including research and development results.

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

Rent textbooks and save BIG at BookRenter. Choose from over 3 million college textbooks and rent new or used cheap textbooks today! BookRenter offers fast shipping both ways and 5 different rental periods.

US patents from 1976 to the present

GetTextbooks.com compares new & used textbook prices from hundreds of online bookstores to find the cheapest textbook prices every time.