In a message dated 97-07-06 13:38:30 EDT, you write: << I think we all share in our congratulations of all those at NASA and JPL responsible for the MARS Rover - hoorah, hoorah, hoorah... Anyone know of a URL that describes the internals ? AND - what types of processors have been used ? Rgds Mike Perth, Western Australia >> Mike, Try http://mpfwww.jpl.nasa.gov This was given on local TV as an alternative to some of the other overloaded web sites. I was told that the rover is controlled by an INTEL 8085. You have to remember that it was designed quite some time ago. Dave Duley