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 This utility will delete records in a file that are duplicates with respect to
 up to six different columns (a column may be one physical "card column" or) the
 entire lrecl or anywhere in between.  For instance, you could specify "deldups
 1 80" for an 80 byte file, and the entire file would be sorted on columns 1
 through 80 and duplicate records would be deleted.  You could also specify that
 records that are duplicate for colums 1-8 be deleted (i.e. the) file is sorted
 on colums 1 through 8, and only these colums are compared to see if the record
 is a duplicate of the previous one.  You may specify up to six pairs of
 columns.  The second column in the pair must be >= the first.