Largest team was involved in the development of Siri

According to Wall Street Journal (WSJ), the largest team at Apple Inc. was involved in the development of Siri in iPhone-4S, which is developed at SRI International, a research institute.
The team worked a lot on the concept of developing an emotional relationship between the iPhone-4S user and Siri. In this project, they worked on making the personality of Siri more humble and friendly, so that a user feels of a real person with him or her.

Two important systems lie behind the Siri. One that listens and translates the user and the other interprets the meaning and respond accordingly.

Users asked different questions ranging from definitions to humorous and gotten interesting responses. Two most interesting responses as mentioned in WSJ are as follows:

Micah Gantman, the director of mobile business at software firm HasOffers.com in Seattle, asked his iPhone: "How much wood would a woodchuck chuck if a woodchuck could chuck wood?" It answered: "Depends if you're talking about African or European wood."

 Nicky Kelly, a 40-year-old from Suffolk, U.K., asked her iPhone: "Tell me a joke." It answered: "Two iPhones walk into a bar...I forget the rest."

Apple purchased Siri in 2010 at $200 million.