Cortana is the virtual assistant using for Bing search in Microsoft, Cortana place on Xbox 360, is Halo 4 on 2012, people can use for Cortana can saying from the Microsoft Build 2016. Cortana in Halo can use for virtual assistant about the Siri assistant, in Cortana menu, Cortana on Halo can be using in information privacy policy on 2015, in January 2016, Cortana using for iPad and iPhone in Microsoft Build 2016 on nine day later.