"if you're looking for an "os for supercomputers", plan 9 might not be your thing. if you're looking for an "os for programmers", plan 9 might just be your thing. - eirk" i never thought in this way. that an OS can be made for supercomputing use and so on. well, in fact i am not too much accostumed with computer yet. And this can be an answer for my problem. So, plan 9 wasnt made for, hmm, heavy computing tasks, like 2 milions of calls of recursive functions working with some complex data structure (not my data structure, hehe), or something like that?