Apple launched the iPhone 4S in October 2011 with Siri, a voice-enabled virtual personal assistant that understands what you say and knows what you mean. Just ask Siri a question or say a command and Siri will go to work for you.

Did you know? Decades of SRI research in artificial intelligence, including leadership of the largest known artificial intelligence project in U.S. history, led to the development of the groundbreaking virtual personal assistant technology called Siri. SRI spun off Siri, Inc. in 2007 to bring the technology to consumers. In April 2010, Apple acquired Siri, and in October 2011, Siri was unveiled as an integrated feature of the Apple iPhone 4S.

Learn more about Siri's history in this innovation timeline, and find more about Siri on Apple's website.

Since the iPhone 4S' launch, Siri has been covered extensively by the media.  Following is a sampling of the coverage to date:

• The New York Times: iPhone Gets Its Upgrade, All Under the Hood | iPhone 4S Conceals Sheer Magic

• White House Office of Science and Technology Policy: Applying iPhone Innovation to Better Schools and Cleaner Energy

• CNN: Apple's Siri voice assistant based on extensive research

• NPR's All Things Considered: Winarsky Talks about Siri
  
  
• Xconomy: Siri, Apple's New Old Personal Assistant App, Points Toward A Voice-Activated Future
  
  
• Washington Post: Carolan Calls Apple's Siri Technology a 'Breakthrough' | Apple Siri: the next big revolution in how we interact with gadgets?
  
  
• Mashable: Siri: From App to Apple & Beyond
  
  
• USA Today: Apple iPhone 4S' Siri says the darnedest things
  
  
• eWeek: Apple Siri Puts Google Speech Recognition in Catch-up Mode
  
  
• PC Magazine: Siri Makes TV Debut in New Apple Commercial
  
  
• 9 to 5 Mac: Co-Founder of Siri: Assistant Launch is a "World-Changing Event"
  
  
• Bloomberg: Apple 'Seriously Under-rated' Siri for iPhone
  
  
• CBS News Tech Talk: Siri Inspires Tech Tourettes and Forms a Duet
  
  
• The Colbert Report: Talking iPhone 4S
  
  
• Forbes: Apple's Siri: "The Culmination of Steve Jobs' Legacy"
  
  
• International Business Times: iPhone 4 Released: Siri Voice Feature is Impressive
  
  
• San Jose / Silicon Valley Business Journal: SRI a Mastermind Behind Much of the Valley’s Technology
  
  
• Time: In the Future, We Will All Talk to Computers
  
  
• VentureBeat: iPhone 4S Review: There’s Something About Siri
  
  
• Wired.com: Gadgets the Pentagon Made—From the Microwave to the new iPhone | With Siri, the iPhone Finds Its Voice