Cortana is an intelligent personal assistant created by Microsoft for Windows Phone 8.1 and Windows 10 (where it now supersedes Bing Mobile), Microsoft Band, Windows 10, and coming to iOS, Android, and the Xbox One.
a force which is the result of two or more forces acting conjointly, or a motion which is the result of two or more motions combined. See Composition of forces, under Composition.
The Electromagnetic Force. One of the four fundamental forces, the electromagnetic force manifests itself through the forces between charges (Coulomb's Law) and the magnetic force, both of which are summarized in the Lorentz force law.