Facebook is hitting the stock exchange with its IPO later this week - and the latest estimates increase its potential valuation, making it the biggest floatation ever. But how did the social network get so big - and can it possibly get any bigger?

It's a fantasy set in medieval times about the violent struggle of two dynasties. But Game of Thrones is having a striking impact in the modern real world of harsh economics.

Twitter now has 10 million active users in the UK, out of 140 million worldwide, the company has revealed – and 80%, an unusually high number, access it through mobile phones.

Internet security firm Total Defense is to establish a new European operations hub in Dublin which is expected to create up to 100 jobs.The IDA said 21 people had been recruited for the Ballsbridge operation to date, and that further positions in the areas of inside sales, operations and customer support were yet be filled.