GEOS did support a "SWAP FILE" on the floppy. It wasn't swap in the modern page fault / virtual memory sense, of course. When you loaded a "desk accessory" (C

GEOS did support a "SWAP FILE" on the floppy. It wasn't swap in the modern page fault / virtual memory sense, of course. When you loaded a "desk accessory" (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 "SWAP FILE", and load the accessory into the region.