Tumblr, the blogging site set up by a 20 year old only six years ago, has been bought by the internet giant Yahoo for more than £700 million.

Yahoo says its $1.1bn (£723m) purchase of blogging platform Tumblr will boost its revenue as soon as 2014.

Yahoo agrees a deal to buy New York-based blogging platform Tumblr for $1.1bn (£723m) in a deal that will value founder David Karp's stake at $275m.

A review of BBC Online and the Red Button service by the BBC Trust finds audiences are served well but BBC Online has failed to hit its reach target.

A smartphone created by former Nokia employees is unveiled ahead of its release later this year.

The BBC talks to Wikipedia founder Jimmy Wales about Yahoo's acquisition of Tumblr, in a $1.1bn deal.

Why Yahoo thinks blogging platform Tumblr is worth more than $1bn

Young children should hear about the dangers of pornography as soon as they have access to the internet, head teachers say.

State-sponsored hackers are renewing their attacks on the US after a three-month hiatus, according to the New York Times.

How do you dismantle an aircraft carrier?

Up to 22 million login names may have been stolen during a hack attack on Yahoo Japan, the web firm warns.

UK astronaut Tim Peake is to fly to the International Space Station, launching on a Soyuz rocket in November or December 2015.

Looking through CCTV feeds that should not be public

The Canadian company tempting music fans back to tapes

Google's executive chairman Eric Schmidt defends the company's tax affairs after it comes in for strong criticism from MPs.

Some people are "put off" making important calls because of confusion over the amount they will be charged, according to the telecoms regulator.

Computers and smartphones have become a "digital dummy" used by parents to pacify their children, says a head teachers' leader.

GPS data could provide faster and more accurate early warning systems for tsunamis, a German team of scientists suggest.

US politicians are seeking reassurances from Google that its smart spectacles will respect personal privacy.

An IT manager who grew frustrated with call centre menus has catalogued shortcuts to thousands of phone services