In all fairness, "CD's" while it may be surprising to you, unaesthetic and unnecessary, is not clearly 'wrong', in so far as some style guides do accept that the plurals of intitialisms and acronyms may be formed using an apostrophe. I agree with you in preferring not to when sense is clear without, but it does not seem to come under the same heading of 'ungrammatical' as the more usual examples of the Grocers' Apostrophe, such as "apple's 70p/lb" or whatever (okay, here I show I have no idea how much a pound of apples costs!), which *is* clearly wrong and ungrammatical.
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Date: 2008-02-22 11:38 am (UTC)