http://www.youtube.com/watch?v=8BLzMCiR0G4#! Very good in two prospective. 1. Voice Recognition. Many of the library out there can’t as accurate as Siri. Have come across some best & famous in my work before. 2. Turing Test. We can say Siri has passed the Turing test. Turing test is a famous term in A.I. invented in 1950s, a “passing machine" means people can’t distinguish, is it a machine or a human at all, in environment comparable to chat rooms or SMS. There is an annual competition on this Turing Test for programmers. A.I. topics, include Decision Trees, FSM (Finite State Machine), Fuzzy Logic, Artificial Neural Network (ANN), Genetic Programming/Algorithm (GP/GA), Machine Learning, Natural Language Processing, and many others. Many of the times, claim-to-be-AI product are actually not AI, but just as marketing slogan (e.g. Home Appliance).