4 ms·The OS/2 subsystem existed and shipped up to Windows 2000.by lukeh 6y agoThe OS/2 subsystem existed and shipped up to Windows 2000.rbanffy 6y agoReally?! I tried to run a couple OS/2 binaries back then without success. Did you have to do anything special?sedatk 6y agoYou had to enable the feature and it only supported OS/2 1.x apps (console). No GUI support.