Danger, Inc. was a company specializing in hardware design, software, and services for mobile computing devices. Founded on December 9, 1999, its most notable product was the T-Mobile Sidekick (also known as Danger Hiptop), a popular early smartphone. The Sidekick or Hiptop was an early example of client–server ("cloud"-based) smartphones and created the App (Applications) marketplace, later popularized by Android and iOS. Danger was acquired by Microsoft on February 11, 2008, for a price rumored to be around $500 million; however, due to a loss of data occurring on October 12, 2009, the company closed its doors on February 28, 2011.
