Can anyone give me an insight into how Siri was built?


Can anyone give me an insight into how Siri was built?

What conversational technology powers today’s AI assistants, such as Siri and Cortana?

Siri’s backend was originally based on a government sponsored (SRI) project called PAL (Personalized Assistant that Learns). CALO, the Cognitive Agent that Learns and Organizes, was developed as part of the PAL project.  What is not so widely known is that SPARK (SRI Procedural Agent Realization Kit) forms the heart of CALO’s task execution.  The real strength of Siri lies in this middleware infrastructure that integrates more than 35 APIs.

See also some of my other Quora answers about Siri:

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