Twitter On Screen

Twitter is a online social networking and micro-blogging service. It's key feature is the limit of tweets to 140 characters promoting fast and live conversations. It introduced the #hastag to the online world; used to indicate subjects and link conversations, it has since spread to all the major social networks.

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TwitPic shutting down - blame Twitter

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Social media David and Goliath? Ironically, the start-up that helped make Twitter into a news and photo-sharing powerhouse, is closing over a trademark dispute.

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