Operating Systems in the Server Space Are There Any Other Operating Systems?

There's a ton of different operating systems and you know some of them are really niches and kind of hobbyist operating systems. Some of them get used for very serious things in the server space for example if you're running a big IBM mainframe. It's not something that anyone on a day to day basis would need to know about but if you're working on mainframes you have to become an expert in using this totally different Operating System. In the embedded space there are what we call real-time operating systems are operating systems that are in very usually resource constrained environments. They give instantaneous feedback and response based on something like a medical device.