rstring, the 'Micro/OS-II may refer to this RTOS from Micrium: <A HREF="http://www.ucos-ii.com/contents/products/uc-os-ii-RTOS.html" target="_new">http://www.ucos-ii.com/contents/products/uc-os-ii-RTOS.html</A> The term MicroC/OS-II seems to be used interchangeably with Micro/OS-II: <A HREF="http://www.rabbitsemiconductor.com/press_room/pressreleases/081500_dc_premier_pr.html" target="_new">http://www.rabbitsemiconductor.com/press_room/pressreleases/081500_dc_premier_pr.html</A> (see 6th paragraph)