JS> Actually, I don't think the gnu sort uses the "/" as a switch at all, 
 JS> just the "-" as a switch symbol.  So it's -r not /r.  Total
 JS> incompatability...  At any rate, I'd highly recommend the gnu sort 
 JS> and delete the IBM/MS SORT.  He could use SED to go though all his 
 JS> scripts to change sort /r's or /+n's to -r's and +n's...

... or if he cannot do that, and *requires* command-line compatibility,
there's always the OS2CLU SORT, which is command-line compatible with the IBM
SORT, 32-bit instead of 16-bit, capable of handling files up to the limit of
available virtual memory rather than up to a mere 64KiB, and faster than the
IBM SORT as well.

 ¯ JdeBP ®

--- FleetStreet 1.22 NR
114/441
292/854