Twitter co-founder Jack Dorsey is to return full time to lead product development, three years after he was pushed out of the company as chief executive.

Boat Race title sponsor Xchanging is to end its financial backing of the Oxford and Cambridge event when its contract expires in 2012.

Internet advertising breaks through £4bn barrier and now accounts for one pound in every four spent.

Ratan Tata and Anil Ambani will appear before a parliamentary committee probing a multi billion dollar telecom scandal.

Mining giant Rio Tinto is negotiating with a major shareholder in Riversdale Mining in a last ditch effort to salvage its takeover bid for the company.

Speculation is growing that the Japanese government could begin talks to nationalise the company that owns the Fukushima nuclear plant.

Tour operator Thomas Cook says it expects the disruption caused by the political unrest in Egypt and Tunisia to cost it £20m.

South Korea's biggest companies are involved in a bidding race as they submit preliminary bids for a stake in logistics firm Korea Express.