Windows 10 IoT Core is an operating system for the Internet of Things. It has no desktop, but allows you to run a single Universal Windows Platform App in fullscreen. Out of the Raspberry Pi series, only the B 2 and the B 3 models are capable of running this OS.
Windows 10 IoT Core is a version of Windows 10 that is optimized for smaller devices with or without a display, and that runs on the Raspberry Pi 2 and 3.
Windows IoT Core does not have a desktop but instead utilizes the rich, extensible Universal Windows Platform (UWP) API for building Windows Applications.
Windows 10 IoT (Internet of Things) is the first Windows operating system to run on a Raspberry Pi.