exactly what is the definition of an "OS" and how many of them might there be, then. or, does Illinois know what a fork is? and can people just add "not legal f

exactly what is the definition of an "OS" and how many of them might there be, then. or, does Illinois know what a fork is? and can people just add "not legal for use in illinois" somewhere and go back to devoting 99.9999999999999 % of there attention to things other than Illinois?