Microsoft Robotics Developer Studio (MSRDS) is a Windows-based environment for developing robot applications. It integrates with Visual Studio and supports languages like C++, C#, and VB. MSRDS has four main components: the Concurrency and Coordination Runtime (CCR) for handling sensors and actuators concurrently, Decentralized Software Services (DSS) for accessing robot state over a web browser, a Visual Programming Language (VPL) using drag-and-drop blocks, and a Visual Simulation Environment (VSE) for testing applications without hardware. MSRDS aims to make robotics development accessible for students, hobbyists, and commercial developers.