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Slashdot: News for nerds, stuff that matters. Timely news source for technology related news with a heavy slant towards Linux and Open Source issues.
Watch full episodes of your favorite PBS shows, explore music and the arts, find in-depth news analysis, and more. Home to Antiques Roadshow, Frontline, NOVA, PBS Newshour, Masterpiece and many others.
W3C's easy-to-use markup validation service, based on SGML and XML parsers.