It's not clear if RFC's is actually wrong or not... Reading discussion on it here:
http://english.stackexchange.com/questions/503/what-is-the-correct-way- to -pluralize-an-acronym
It's the s on the end of 'comments' that makes it ambiguous.
*NEVER* with apostrophes. We're English, man! :-)
RFCs. APCs. TLDs. The apostrophes on plurals are an abomination ;-)
But what if we want to mention more than one RADIUS ? What would it be (assuming we're English) ? RADIUSs ? RADIUSes ? This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message.