[iMore.com]

Siri launched in 2011 and can now be found on all modern iPhones and iPads. It's a virtual digital assistant that uses natural language voice control and sequential inference to listen to what you want and provide the best possible information or answer it can provide. It can help you stay connected, organize your life, and get thing done both professional and personal. It can also do a lot of cool tricks... all you have to do is know what to ask!

Full story from the iMore Blog...