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DYNAMIC-WIND vs. multi-processing

     If DYNAMIC-WIND should be used only for
     dynamic binding I suggest that we should either say so in the
     description or just scrap it in favor of an explicit dynamic binding

The problem with this is that fluids are not really sufficient in an
operating system.  You also have things that must be done when
switching users, such as changing the states of I/O buffers and
interlocks.  I really don't see how you can make an operating system
without such a thing.