I’d just like to interject for a moment. What you’re refering to as MOS, is in fact, MOS/GNU/Linux, or as I’ve recently taken to calling it, MOS plus GNU plus Linux. MOS is not an operating system unto itself, but rather another free component of a fully functioning GNU/Linux system made useful by the Linux kernel, GNU corelibs, shell utilities and vital system components comprising a full OS as defined by POSIX.