"In 1968, while employed at the United States National Radio Astronomy Observatory (NRAO), Moore invented the initial version of the Forth language to help control radio telescopes."
I know of one: the U.S. Naval Observatory near Flagstaff, Arizona. I lived in Flagstaff in 1979. I knew the astronomer and visited him at the observatory at night. He showed me a terminal running Forth that could control the telescope.
https://en.wikipedia.org/wiki/Charles_H._Moore?wprov=sfti1#E...
"In 1968, while employed at the United States National Radio Astronomy Observatory (NRAO), Moore invented the initial version of the Forth language to help control radio telescopes."