<p>This morning, we reached an important development milestone: the beginning of the "Office 15" Technical Preview Program. Office 15 is the codename for the next generation of the Microsoft Office products and services, and the Technical Preview is the first time we share our work with a select group of customers under non-disclosure agreements. These customers play a key role in our development process by testing early builds and providing feedback, which we incorporate into the final release. </p>