There are very different notions of OS and what its responsibilities and capabilities should be. In the world of Lisp and Smalltalk, you have a holistic view o

There are very different notions of OS and what its responsibilities and capabilities should be. In the world of Lisp and Smalltalk, you have a holistic view of what computation means. In Unix, complexity is pushed outward. Web browsers, language runtimes, virtual machines and containers are all examples of people expressing their needs by simulating operating systems.