The letters will use a mix of messages, including some offering recipients a savings-account feature.

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Verizon Wireless also is taking a booth for the first time, and will feature some four dozen partners, including smartphone makers, chip makers and consumer-electronics companies.

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Many of the winning applications had some kind of social networking feature, including Life360, a location-based system that, among other things, allows users to form social networks with others in their neighborhood.

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The performance, via video-link from the Ahoy sports arena in Rotterdam, was to feature some of the Netherlands' best-known stars including Marco Borsato and Trijntje Oosterhuis.

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The program will also feature interviews with some of the world's leading architects including Lord Norman Foster, Zaha Hadid and Wolf D Prix.

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It turns out 120 feature films a year, has four stock exchanges (including the third largest in the world), some 6, 500 factories and is headquarters for major companies such as the Tata Group, Reliance and the State Bank of India.

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