Interesting show!  I was a grad student in Arizona working with the gamma-ray group at SAO's Whipple Observatory (just south of Tucson). My first task was to develop a tracking system for the 10m Atmospheric Cherenkov Telescope. We used Forth running on a Z-80 daughter board hosted by an Apple II. This same hardware was used to control a 24" telescope. That system was developed by a fellow who had worked for SAO's Satellite Tracking Program. In fact, several other staff members at Whipple had traveled the planet installing, operating and maintaining the Baker-Nunn cameras used to photograph satellites and determine their orbital elements.

The amusing thing is that a couple of years after I graduated they replaced the Apple II with a PC and tried to reverse engineer the Forth code. Given that the tracking code wasn't all that complicated this was sheer insanity. My experience with Forth is that even your own code became rapidly inscrutable. Probably a reflection of my coding acumen at the time rather than Forth intself.