Meet Cortana, Microsoft's Siri

Microsoft has lifted the curtain on its new mobile search assistant, Cortana, its version of Siri and Google Now.

Cortana is part of Microsoft's new Windows Phone 8.1 software, the mobile platform's first major update in 18 months. The "personal digital assistant," has the ability to search the Internet, set up alarms, shift calendar appointments, find restaurants, send messages, place calls and more. Microsoft unveiled the update at its Build developers conference in San Francisco on Wednesday.

Interacting with Cortana is very similar to using Apple's Siri. Push an on screen button, ask a question in a conversational manner, and Cortana will go to work.

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