┌────────────────────────────────────────────────────┐
│                   File Sorter.                     │
└────────────────────────────────────────────────────┘

SORTFILE  expects  the user to supply a filename, which
can  include a directory pathname, as well as the start
position  and  length of the field on which the file is
to be sorted. 

The  program  first checks the size of the file and the
amount of free RAM available to see if it can be sorted
in  memory.  If  it is too large, the file is sorted in
place.  This  method,  which  is far slower, allows the
file to be of any size up to 4 Gigabytes.