To commemorate World Radio Day on 13 February 2013, the United Nations Postal Administration has issued six stamps with a special augmented reality feature. This special feature allows anyone using an iPhone, smart phone or tablet to download and launch the U.N. Radio app, view the stamps and learn more about U.N. Radio through a link. This special link unlocks the wonder of U.N. Radio, offering programming from around the globe, from classic broadcasts to current meetings, briefings and special events.