Re: English question

At 3:15:30 AM on Thursday, June 4, 2009, G&P wrote:

> To my horror, I have found something in English I do not
> know how to punctuate.

> An apostrophe is used in plurals after numbers and
> letters, so we are right to say "the 30's", and "6 CD's",
> or "6 GP's".

That's certainly not the usage that I was taught, especially
for dates: I was taught that correct usage is 'the 1930s',
'the 30s', 'two CDs', etc. Digging around, I find several
people quoting the MLA style guide: 'Do not use an
apostrophe to form the plural of an abbreviation or a
number'.

Brian