Siri is an application for Apple Inc.’s iOS which works as a personal assistant and knowledge navigator. The application uses a natural language user interface to answer questions, make recommendations, and perform actions by delegating requests to a set of Web services. The software, both in its original version and as an iOS application, adapts to the user’s individual language usage and individual searches (preferences) with continuing use, and returns results that are individualized. The name Siri is Scandinavian, a short form of the Norse name Sigrid meaning “beauty” and “victory”, and comes from the intended name for the original developer’s first child. Siri was originally introduced as an iOS application available in the App Store by Siri, Inc., which was acquired by Apple on April 28, 2010. Siri, Inc. had announced that their software would be available for BlackBerry and for phones running Android, but all development efforts for non-Apple platforms were cancelled after the acquisition by Apple. Siri has been an integral part of iOS since iOS 5 and was introduced as a feature of the iPhone 4S on October 14, 2011. Siri was added to the third generation iPad with the release of iOS 6 in September 2012, and has been included on all iOS devices released during or after October 2012.