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Dean Obeidallah asks whether the Department of Homeland Security's surveillance of social media websites is an invasion of our privacy.

The Women's World Cup final between Japan and the United States set the record for tweets per second, eclipsing the wedding of Prince William and Kate and the death of Osama bin Laden.

Naysayers still dismiss Twitter as a platform for people who post self-promotional links or trivial details about their daily lives -- this tuna sandwich is tasty! --- but there's no denying its growth.

The Facebook "Like" and Twitter "Tweet" buttons that appear on so many websites do a lot more than just help you share content with friends.

The Courtney Love Twitter-libel saga has finally come to an end — an ending with six figures. According to the AP, Love will pay $430,000 to settle a libel lawsuit brought against her by designer Dawn Simorangkir, a.k.a. “the Boudoir Queen.”

There have now been more than 20 billion tweets since Twitter (Twitter)’s inception, according to tracking service GigaTweet. The milestone comes just two months after the service hit 15 billion tweets and about five months since it reached 10 billion, indicating that activity levels on the microblogging service continue to accelerate.

Yahoo! and the micro-blogging site Twitter have struck a content-sharing deal, they announced Wednesday -- a plan that will share real-time tweets with the 600 million users in Yahoo's global network.

Twitter just announced that it now sees 50 million non-spam messages every day. That's interesting but it means more when you look at it in context.

White House press secretary Robert Gibbs has a new way to communicate directly to people — Twitter. President Barack Obama's chief spokesman ventured into the Twitter world on Saturday with his first 'tweet' or Twitter message on his ...

It was the upstart rock star of the Internet in early 2009, roaring out of relative obscurity to become one of the most exposed -- some would say overexposed -- services on the Web.