Comment by pjc50

RISCOS was great, although slightly eccentric in a couple of ways:

- "we have a three button mouse, we're going to make use of all of them" as opposed to Apple

- instead of file pickers, saving was done by drag-and-drop: press save and a window pops up with the file, which you drag to a target folder.

The !Application system, an early bundle mechanism, was a simple and effective form of packaging without having to do anything fancy.