Move over Siri: Microsoft launches speaking personal assistant for phones
Cortana, developed for mobile phones with the help of real-life personal assistants, will challenge Apple's Siri and Android Google Now

Microsoft is taking on Apple's Siri and Google Now with a speaking smartphone personal assistant dubbed Cortana.

"Cortana is the first truly personal digital assistant who learns about me, and the things that matter to me most, and knows about the whole Internet," Belfiore said in a presentation to application developers.
Cortana responds to conversationally spoken requests or commands, using insights gleaned from calendars, contact lists, online searches and other smartphone sources to respond in a manner akin to a real-life aide, Belfiore said.

Cortana's voice and character are based on a popular artificial intelligence character in Microsoft's blockbuster Xbox console video game Halo.