Siri

Siri (Speech Interpretation and Recognition Interface) is an intelligent personal assistant and knowledge navigator which works as an application for Apple's iOS. 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. Apple claims that the software adapts to the user's individual preferences over time and personalizes results, and performing tasks such as finding recommendations for nearby restaurants, or getting directions.1


Sources:
1. http://en.wikipedia.org/wiki/Siri_(software)