Hashtags: from Twitter to Facebook

Tweeters have been organising their thoughts using hashtags for years. Now Mark Zuckerberg wants to bring them to his social networking site

Google Glass: is it a threat to our privacy?

The tech giant's 'wearable computing' project is now being tested by volunteers, meaning you might already have been surreptitiously filmed and uploaded on to Google's servers. How worried should you be?