Documentation please. Perhaps SRI originally prototyped on Mathematica, but I do not believe our iPhones are running m scripts in a Mathematica interpreter.
"Siri is a personal assistant application for iOS. The application was first available from the App Store, then came standard on Apple's mobile devices starting with iPhone 4S. Siri uses natural language processing to answer questions and perform actions by delegating requests to an expanding set of web services, including Wolfram|Alpha."