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     The memory allocation strategies are:
 
     First Fit: MS-DOS searches the available memory blocks from low
     addresses to high addresses, assigning the first one large enough
     to satisfy the block allocation request.
 
     Best Fit: MS-DOS searches all available memory blocks and assigns
     the smallest available block that will satisfy the request,
     regardless of its position.
 
     Last Fit: MS-DOS searches the available memory blocks from high
     addresses to low addresses, assigning the highest one large enough
     to satisfy the block allocation request.
 
     The default MS-DOS memory allocation strategy is First Fit
     (code 0).
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