it was a long time ago, but there used to be a model of the state machine for selecting a file in the mac os9 Finder that was often shared (yes i'm talking abou

it was a long time ago, but there used to be a model of the state machine for selecting a file in the mac os9 Finder that was often shared (yes i'm talking about around the time that OS9 was current). I don't suppose anyone remembers that? I'd love to see it again