What is unique about Linux,Unix,Windows,mobile development soft and is it possible to run all the separate OS in 1 single OS?if yes how,if no,why not?

Hello, Such a scenario is possible via Virualization. Here you'll have one Physical Server which will have a HOST OS installed On this HOST OS there will be a Virtual Platform Installed, it could be HyperV or VMWare This Virtual Platform will run Several other OS's. This is how you achieve to run multiple OS on a Single OS. Note: the Base Hardware Configuration must be appropriately high. Thanks, Jay J. Joshi.

yes it is possible to operate all system in a single platform...

let us take a example of .net it support many languages together so we can use it by this type of templates.. now a days there is no such type of platform but it will come sooner..