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Geocaching is a treasure hunting game where you use a GPS to hide and seek containers with other participants in the activity. Geocaching.com is the listing service for geocaches around the world.

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...

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

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

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.

Activate study mode with book reviews, free essays, course notes, flashcards and other study tools. Millions of students use us to help with their homework assignments.

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

The National Center for Education Statistics (NCES) collects, analyzes and makes available data related to education in the U.S. and other nations.