:: About speed, if you try to write and run a number-crunching application for plain DOS and the same for Windows and you benchmark them, you' ll see what i mean.
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Yes, I agree with you about speed -- Windows and unix are not very good for real-time applications. I did that kind of bench mark a few years ago when we thought of porting our real-time app from MS DOS 6.X to Windows 95 or unix, and found that it would not work because windows and unix were too slow.