the menu at the top of the screen was always associated with the application you were running on the macintosh

this is from 01987

its discoverability was pretty decent compared to the other user interfaces that were popular in 01987, like ms-dos, lotus 1-2-3, the bourne shell (no tab completion), the bsd c shell (control-d for filename completion), emacs, vi, commodore 64 basic, vax vms dcl, etc.