Only Mac OS 10 and later, based on BSD, uses ‘/‘. (And, I guess, A/UX.) Classic MacOS used a ‘:’, but it wasn’t regularly exposed in the UI. The only way most users would know is that the colon couldn’t be used in a file name.

Voyager’s computer, at least, works on quaternary (4 state) data rather than binary (2 state) data. They keep referring to data storage quantities in quads rather than bits or bytes.

“You know, you really don’t cook enough roasts, Leela.”

They’re able to recycle 93% of the water on the station. The leftover high concentration waste water, along with the poop bags, are loaded into a Progress or Cygnus cargo ship that burns up on reentry.