Correct, the NT kernel etc has nothing to do with OS/2. But they raided OS/2 for parts: LAN Manager was ported over ("Windows networking"), OS/2 1.3 personality

Correct, the NT kernel etc has nothing to do with OS/2. But they raided OS/2 for parts: LAN Manager was ported over ("Windows networking"), OS/2 1.3 personality, I think NTFS may have been based on HPFS, etc.