Source : Free On-Line Dictionary of Computing

VxWorks
     
         A {real-time} {multitasking} {operating
        system} from {Wind River Systems}.  Originally it used the
        {VRTX} {kernel} but this has been replaced by Wind River's own
        "Wind kernel 2.4".
     
        Before version 5.3 VxWorks included a {software development
        environment} but this is now called "Tornado".
     
        Current version: 5.3, as of 1996-11-28.
     
        (1996-11-29)