Facebook's $5 billion initial public offering could give the social network a market capitalisation akin to Silicon Valley's two other giants

The FBI is seeking to develop software to scan Twitter and Facebook for 'emerging threats'

Twitter says it must block tweets to grow internationally, but promises to clearly mark when it does so

Google+ has reached 90 million users as the search engine giant revealed it has missed its financial targets

Things have moved on since CEOP's Facebook campaign, but child protection in social media still needs careful thought, says Peter Judge

Nearly 50 million US visitors used the social network in December, up 55 percent from the 30 million in November

Google+ now has more than 62 million users and is apparently on track to reach 400 million by the end of 2012

Yahoo is relying on rival Facebook to add social activity, bringing in a younger audience, and boosting ad revenues

Bad news for Google+ after comScore found that Facebook and Twitter dominate the growth of social networking

Facebook is to ring in the new year by beginning to insert adverts into users newsfeeds and updates