Apple becomes the most valuable company in the US, with its market capitalisation overtaking that of Exxon Mobil.

Onlive is to launch its cloud-based gaming service in the UK on 22 September.

Losses at daily discount website Groupon increase sharply after it took on an extra 1,000 members of staff to continue its expansion.

Senior technology consultant at Sophos Graham Cluley explains the danger of using bad quality pictures to identify looters.

An attack by hackers on the Hong Kong stock exchange forces trading in seven shares to be suspended.

The Large Hadron Collider collaboration begins a "citizen science" project to tap volunteers' computing power to simulate particle collisions.

PCs are going the way of typewriters and vinyl records, says one of the engineers who worked on the original IBM machine.

Text messaging and social networks such as Twitter could be turned off during social unrest under plans being considered by the government.