On Thu, 14 Mar 2013 08:59:14 +0000, Orchid Win7 v1 wrote:

> Unix commands and their switches follow no reason or rhyme

Sometimes it certainly appears that way.  In this instance, I think it's 
a case of "-r" and "-R" were already used as a secondary option for the 
query parameter, and 'e' is the next letter in "remove".  -U was already 
used for "upgrade".

Jim

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