Other, as in "The OS state of more or less lacking an OS", as experienced by some of the world's fastest "computers". They are computers in the sense that they do take data, correlate it, and spit back an answer, although it's amusing just how much. For a case of "What the fuck is suo talking about again?", go look up root DNS servers.
Other at the same time referring to "Any", in that all applications are occasionally stuck to one OS or another and after that porting them is a real bitch, usually since the program itself has crap code.