operating system A real-time operating system written by

Microware Corporation. The original version was written

about 1978 for the Motorola 6809 and has since been ported

to the Motorola 68000, Intel 80386, Intel 486, and the

PowerPC. The kernel of OS-9 is ROMable, modular, with a

unified file system, allowing it to easily be scaled up or

down as required.