Comment by trollbridge

Slight nitpick: OS/2 2.x+ did not have a way to disable paging, although you could disable virtual memory in any version of OS/2 by simply setting MEMMAN=NOSWAP.

On Windows 3.x, paging and swapping was optional - if you started it in 286 ("standard") mode. On Windows 95, paging is not optional, and it's not optional in Windows 3.11 for Workgroups either.