GEOS did support a &quot;SWAP FILE&quot; on the floppy.  It wasn&#x27;t swap in the modern page fault &#x2F; virtual memory sense, of course.  When you loaded a &quot;desk accessory&quot; (Calculator, notepad, etc.) from within another application, it would carve out a piece of RAM large enough for the accessory, write the prior contents of the memory to &quot;SWAP FILE&quot;, and load the accessory into the region.