LivingInternet.com
General guide to the Internet, includes sections covering the history of the Web, email, Usenet and other topics.

World Wide Web Consortium
International industry consortium founded in 1994 whose purpose is to develop specifications, guidelines, software, and tools to promote the Internet's evolution and ensure its interoperability.

Google Groups

AltaVista

A9

AOL

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Clusty

Gigablast

Google

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MSN

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Wikipedia