Was that the RTOS used with the T-11 (the first single-chip PDP-11?) I seem to remember that it was used as the RTOS in the LA-120 printer. Oh, and I almost forgot - the only use of RT11 that I know of for an "embedded" system was the CFEs for the VAX 780 and 8600 (on a 11/03 in the former and a PRO in the latter). Are there any more? Bob