Facebook opens Johannesburg office as it looks to add to its existing 120M users on the continent.
Dick Costolo had been under pressure from investors unhappy with the firm's user growth.
President Barack Obama quickly amassed a multitude of followers to his personal Twitter account.
The social media giant announces it will allow more websites to join "free mobile data" plan amid backlash.
Tens of thousands of users of the social networking site allege violation of European privacy laws.
Sites comply with court order to stop sharing images of a prosecutor being held at gunpoint.
More than 1,000 properties listed on the vacation home rental site, but can only be booked by users in the U.S.
Messenger service opens up to third-party developers, allowing them to add functions of their own.
Monica Lewinsky took to the stage at the Ted conference to call for a more compassionate internet.
Group suspended one year amid allegations that nude female photos were posted without subjects' knowledge.
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