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Re: The Plural of RPM

Subject: Re: The Plural of RPM
From: "Gene Kim-Eng" <techwr -at- genek -dot- com>
To: <tom -dot- green -at- iwon -dot- com>, <techwr-l -at- lists -dot- techwr-l -dot- com>
Date: Tue, 2 May 2006 11:26:57 -0700

RPM is the abbreviation for "revolution/s per minute," so
singular and plural are the same when applied to a one
value, i.e., "one revolution per minute" = "one RPM,"
"500 revolutions per minute" = "500 RPM." If referring
to more than one rotating object I would prefer to say
"RPM values" or "RPM readings," but if adding an
"s" is unavoidable, it's "RPMs."

"RPM's" could be a possessive (hard to imagine a valid
context offhand, but there must be one somewhere) or
(more commonly, I think) a contraction, i.e., "That
RPM's too high."

Gene Kim-Eng



----- Original Message ----- From: <tom -dot- green -at- iwon -dot- com>
To: <techwr-l -at- lists -dot- techwr-l -dot- com>
Sent: Tuesday, May 02, 2006 11:03 AM
Subject: The Plural of RPM




I'm having a back-and-forth with an engineer about how to write more than one RPM. She wants to write, "RPM's." I freaked and said, "No, that would be saying, it's the Rotation Per Minute's problem."
I know, it doesn't make sense.
I want to simply write RPM, meaning Rotations Per Minute.

Am I correct or is there another way?


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References:
The Plural of RPM: From: tom -dot- green -at- iwon -dot- com

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