The differences between Windows 95 and Windows NT

Lack of Unicode implementation for most of the functions of Win95. Different extended error codes. Different number window and menu handles. Windows 95 implements some window management features in 16 bits. Windows 95 uses 16-bit world coordinate system and the coordinates restricted to 32K. Deletion of drawing objects is different. Windows 95 does not implement print monitor DLLs of Windows NT. Differences in registry. Windows 95 does not support multiprocessor computers. NT implementation of scheduler is quite different. Different driver models. Win95 was built with back-compatibility in mind and ill-behaving 16-bit process may easily corrupt the system. Win95 starts from real DOS, while WinNT uses DOS emulation when one needs a DOS. Win95’s FAT is built over 16-bit win3.1 FAT (not FAT32!, actually, Win95’s FAT contains two FATs).