Jonathan De Boyne Pollard wrote in a message to Jack Stein:

 JS> Note that the "+n" stuff is the same, as is the /r for reverse. That 
 JS> seems to make them totally compatable?

 JDBP> The option on IBM's SORT is "/+n", not "+n".

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

                                              Jack 
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