Microsoft is developing a new app for running Windows Phone OS specifically designed to help people better use MSOffice on smartphones.

Called "Work Assistant", the app is an improved version of Cortana, Microsoft's digital assistant. It uses voice commands and a user can ask it for more information about anything having to do with MSOffice.

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Rumors persist Cortana. might soon be integrated into Office apps and that it might not be only for mobile devices but also for desktop device. This January, Microsoft showed off Cortana's ability for to do things simply by having a person use his voice to command Cortana.

Work Assistant is a private internal beta, however. It's 2 MB in size works on devices that run Windows Phone version 8.1.

To work, it requires information on users' appointments, contacts, Internet connection and microphone. Media reports said the Work Assistant app is being developed by Microsoft's Digital Life + Work group.

What has gotten most attention about this upcoming app is that Bill Gates seems to be involved in this project.

In a recent Reddit Ask Me Anything (AMA) session, Gates admitted he was helping Microsoft work on a new Personal Agent project but didn't offer details. It's now widely held this Personal Agent project is actually Work Assistant.

Gates said Personal Agent will remember everything and help a user go back and find things. It'll also help you pick what things to pay attention to.

"The idea that you have to find applications and pick them and they each are trying to tell you what is new is just not the efficient model -- the agent will help solve this. It will work across all your devices", Gates said.