An attendant demonstrates the use of the Avanade Mobile Airline Platform developed by Microsoft Corp. and Avanade Inc. for processing in-flight sales and services, shown on a Nokia Oyj Lumia 1520 smartphone powered by the Windows Phone 8 mobile operating system, at the Microsoft booth during the Singapore Airshow held at the Changi Exhibition Centre in Singapore, on Tuesday, Feb. 11, 2014. The air show takes place from Feb. 11-16. Photographer: Brent Lewin/Bloomberg via Getty Images
