I keep coming across the claim that Windows NT and 2000 can run OS/2 programs (due to the shared history between IBM and Microsoft). And indeed, it works – to some degree:

This compatibility layer only applies to 16 bit OS/2 1.x programs:


32 bit OS/2 2.x programs don’t run:

I wonder how many text mode 16 bit OS/2 programs still existed when Windows 2000 came out. 🤔 Was it really worth keeping this subsystem around for so long?

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