Bono: “oops” – how Bono began his apology for the Apple stunt in which U2’s ‘Songs of Innocence’ album was automatically downloaded to iTunes accounts.   Photograph: Danny Lawson/PA Wire

A is for Adnan Syed. Convicted of the 1999 murder of Hae Min Lee, the Baltimore man’s case is the subject of this year’s most talked-about investig(...)

WhatsApp co-founder Jan Koum (back left) is pictured during a reunion of his old security group, w00w000 in San Francisco, California. Photograph:   Suzan Song/Handout via Reuters

A few days after selling WhatsApp to Facebook for $19 billion, Jan Koum stepped into a suite at the St Regis Hotel in San Francisco to celebrate wi(...)

Denis O’Brien grew his wealth by $800 million last year, according to Forbes, making him the second richest person in Ireland and the 234th in the world with a fortune of $6 billion. Photograph: David Sleator/The Irish Times

Denis O’Brien, the telecoms and media entrepeneur, added $800 million (€579m) to his fortune in 2013, according to the just published Forbes Bi(...)

WhatsApp chief executive an Koum delivers a keynote speech at Mobile World Congress.  Photograph: Albert Gea/Reuters

What’s missing from WhatsApp? According to chief executive Jan Koum, it’s a voice function, but the company plans to remedy that in the second quar(...)

Mark Zuckerberg, chief executive officer of Facebook

There’s a funny YouTube sketch by Dublin’s Pork Street comedy troupe called “There’s Too Many Apps For That”, in which comics Jim Elliot and D(...)

Facebook’s great gamble

How is a US start-up technology company, which employs 50 people but has 450 million users of its global messaging application, worth $19 billi(...)

Never in the history of technology acquisitions has a company’s name been so apt. “What’s the WhatsApp app?” was the tongue-twister on a lot of(...)

WhatsApp, which has 450 million users, has stuck to basic messaging, but also a simple business model of charging users an annual subscription fee of just $1. Photograph: Brent Lewin/Bloomberg

In recent years, a bevy of messaging apps has fought for global domination, with many boasting a lucrative combination of communications featur(...)

WhatsApp co-founder Brian Acton, who was turned by Facebook for a job in 2009. Photo: Peter DaSilva/The New York Times

It turned out to be an expensive mistake for Mark Zuckerberg. A $19bn one to be precise. In the summer of 2009 Facebook turned down WhatsApp co(...)

WhatsApp founders Brian Acton (left) and Jan Koum at company headquarters in Mountain View, California, lst year. PHOTOGRAPH: PETER DASILVA/NEW YORK TIMES

WhatsApp Messenger’s sale to Facebook for up to $19 billion on Wednesday may sound like a classic Silicon Valley success story. Yet Jan Koum an(...)