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Do you use an apostrophe in plural acronyms and initialisms?

Do you use an apostrophe in plural acronyms and initialisms?

Two CD's
Two CDs


Votes: 1478 Comments: 18 Added: September 2003
Comments:
Bridget - 7th November 2003 22:47
Oh no! The evil apostrophe rears its evil head again!

The apostrophe indicates possession. Ironically, it has now possesses those who incorrectly use it to make the plural. We, the literate, understand that adding an s to a word makes it plural!
 
Joan - 22nd November 2003 00:27
How would you make a letter plural?
Mind your ps and qs.
Mind your p's and q's.
Mind your Ps and Qs.
 
willbut - 28th November 2003 23:51
Ps and Qs
 
weisen - 16th February 2004 06:28
Use of apostrophes in order to form the plural of certain non-words is quite normal, accepted, and cited in style manuals.

This is a judgment call for the writer, but there are several style manuals available on-line (e.g. the Hunter College manual) that indicate that apostrophes can be used to form plurals in unusual cases where just adding an "s" makes the word unrecognizable: e.g. "mind your p's and q's"
 
Dmitry - 4th April 2007 11:41
Personally, I would either use Ps and Qs or "p"s and "q"s. The apostrophe is not for making something plural. In most cases, adding the letter "s" on the end of the word is.
 
mgrace - 17th August 2007 20:05
What about acronyms where the noun to be pluralized is not the last word? For example, [and sorry for the healthcare -specific reference] TOB stands for Type of Bill. To pluralize this you really are talking about Types of Bill (bill types). So there would be no s or 's at all...
 
m.jeffree - 23rd November 2007 14:41
surely the apostrophe is simply substituted for the missing letters between D and s i.e. "isk" and has nothing to do with possession, just as the apostrophe in it's represents the missing "i" in "it is" and does not indicate the plural of it?
 
David L - 14th January 2008 20:12
I'm afraid explaining away the apostrophe to make a word plural doesn't hold up, even in the case of representing the missing letters in CDs. If it were "CD's" and the apostrophe stood for the "isc" in Disc, then wouldn't it follow that another apostrophe would be needed for "ompact" in Compact? C'D's would be just plain ridiculous. I think you do whatever improves readability, i.e. CDs and p's and q's.
 
Tracy - 26th January 2008 02:57
According to most style guides, pluralizing initialisms and acronyms with an apostrophe is acceptable though not widely used. Individual lower case letters (such as "p's and q's") are usually formed by adding the apostrophe, but capital letters use just the s.
 
john - 15th April 2008 16:26
This is a case where common usage trumps any kind of dictated rule. Do you go to an Oakland As game or do you go to an Oakland A's game? This si how language evolves.
 
Benji - 27th May 2008 01:50
Well, I say CDs and Oakland As, but when specifically referring to a letter, I use an apostrophe. Xs and Os doesn't look right. X's and O's is slightly clearer, and whether that's common usage or not, I prefer it. Another example: I get A's and B's in school. Not As and Bs.
 
Earl - 14th June 2008 03:56
An apostrophe is appropriate in this instance. Also in p's and q's. It is absolutely used to denote possession, but that's not its only use. It can also be used to denote something missing (O'er there, wasn't, etc.) In this case it's showing some missing letters.
 
James S - 27th August 2008 14:01
The noun here is not CD, it is Compact Disc. I firmly believe that an apostrophe should be used here to indicate the absence of the isc in Discs (I am not using inverted commas for clarity). David L's suggestion that with my logic the C for Compact would need an apostrophe is absurd for what I hope are obvious reasons. The moment we are picking and choosing which letters we are including from a word, we need an apostrophe to indicate the missing ones. (Do not=Don't, Department=Dep't, Sergeant=Serg't). This is basic English. The whole confusion arises from people's misconception that apostrophes are solely used to indicate possession. The widespread misuse of apostrophes to pluralise annoys us all so much that I feel many overlook that possibly, in the case of CD's, DVD's etc. they may actually be right even if they are blissfully unaware of why.
 
Gerry - 29th August 2008 18:14
I work in tax in the UK.We have a whole host of forms that need to be filled in, and they all have names. For example, there is a form P11d. How do you pluralise it? P11ds makes it look like the "s" is part of the name; and so surely only P11d's makes sense.

Well, if I'm going to use an apostrophe is some circumstances for plurals, I'm going to be consistent. Whenever I'm pluralising initials, acronyms, numbers etc, I'll use an apostrophe.
 
John W - 4th September 2008 14:01
Surely no-one would write, "How many as are there in abracadabra?" This doesn't give the right sense at all. The correct sense is given by "How many a's are there in abracadabra". When it comes to that, the answer ("There are five as") also is a bit nonsensical without an apostrophe.
 
Al - 25th September 2008 04:17
I would write, "How many "a"s are there in abracadabra." with the usage of the quotation marks indicating the intent to use the subject letter as a specific noun (the name of the character of the alphabet) instead of as normal usage.

While I believe the use of an apostrophe to show the plural of CD to be incorrect, I wouldn't fret about it as common usage always trumps old rules in language.
 
Kathy L. - 26th September 2008 23:28
Common usage does not necessarily result in excellence, even though certain people feel that it "trumps old rules in language." Adding an apostrophe to form plurals of initials, acronyms, and numbers is for the purpose of clarity and ease in reading the text. I will continue to add an apostrophe because I strive for excellence.
 
annel - 27th September 2008 14:01
I have a real dilemma - I oversee the quality of school reports going out to parents - teachers use acronyms so commonly - SATs GCSEs BTECs - their reports are an absolute mismatch of using and not using the apostrophe. For consistency I remove all the apostrophes before the reports go home - but feel like I am fighting a losing battle - and may be should just give up?
 
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