Unmanned aerial vehicles are being used to help aid relief in Nepal.

Twitter has reported lower than expected revenue for the first three months of the year, saying that new products sold less well than forecast.

American Airlines delay dozens of flights after an iPad app used by its pilots stopped working.

Nasa jointly develops a plane wing that can change shape during flight, reducing drag and improving fuel efficiency.

A Texas judge whose Facebook posts led to a mistrial is appealing against a ruling that she take social-media classes.

Using thermal cameras and X-rays, engineers get a detailed view of overheated lithium-ion batteries failing and exploding.

Illegal streaming app will be blocked in the UK after a successful legal challenge from Hollywood movie studios.

The Nasdaq stock market says its "regrets" an "operational error" which led to Twitter's results being released early.