<A HREF="http://www.radisys.com/microware.cfm"
  >RadiSys</A>'s (was Microware) <A HREF="http://www.radisys.com/oem_products/op-os9.cfm?MS=Microware%20Enhanced%20OS-9%20Solution"
  >OS-9</A> is _(real-time) *(OS) (_(RTOS)), widely used, and still in good shape after so many years.
