Windows is a choice of closed source proprietary business operating atmospheres for PCs and servers. The range was first established by Microsoft in 1985 and finally has come to control the world PC market. All new versions of Windows are completely fledged operating systems. Windows is the Operating System (OS) developed by Microsoft. The Windows source code is proprietary, meaning that only Microsoft programmers have access to programming code. Linux for example is a community driven Operating system permitting everybody to contribute.