The apostrophe thing cropped up a while ago and IIRC the consensus was that CD's or LP's is incorrect and should be CDs and LPs and so on.
WELL, I've done a little research and checked my copy of Michael Swan's book Practical English Usage and on page 2 I found and I quote....
plurals
an apostrophe (') is sometimes used before the s in the plurals of abbreviations:MP's or MPs; CD's or CDs. ....
Anyway I hope after posting that, that I've crossed all my T's and dotted all my I's or should I say i's?
And yeah, the intergrated one gets to me too.