The original comment was about running DOS programs under OS/2 1.0. The comment I replied to seemed to be under the impression that OS/2 didn't care about the

The original comment was about running DOS programs under OS/2 1.0. The comment I replied to seemed to be under the impression that OS/2 didn't care about the DOS memory model, but of course it did, because it ran DOS programs in real mode. But really calling memory above 1MB Extended Memory was just to differentiate it from Expanded Memory which was memory that was banked into the address space above 640k.