Siri, IOS Intelligent Personal Assistant Answers, IPhone 4S

Siri is a spin-out from the SRI International Artificial Intelligence Center, and is an offshoot of the DARPA-funded CALO project, described as perhaps the largest artificial-intelligence project ever launched.
Siri's primary technical areas focus on a Conversational Interface, Personal Context Awareness, and Service Delegation.
Siri's voice recognition engine is provided by Nuance Communications, a speech technology company.
Siri's actions and answers rely upon a growing ecosystem of partners, including: