How did Microsoft keep Surface a secret for so long? There were rumours about a Microsoft Windows RT tablet on and off for months, but never with enough detail to make them credible.
Microsoft has a major manufacturing design setup in what it calls the Garage, full of 3D printers, injection moulding machines and computer-controlled laser cutters.
But that's not where it worked on the designs for Surface because it's far too public. Instead, the design team initially worked in what Stevie Bathiche (pictured below), Microsoft's hardware maven, calls an underground bunker with no windows.