Often reading these pages, UseNet, the 'other' GA forum etc, you come across acronyms, some of which are obvious, some are not. For example LOL. I thought this meant Laughed out Loud, but I've seen it plopped onto the end of sentences where it wouldn't make sense if it were Laughed out Loud.
Another example: my partner often confuses GPS with GPRS (I wouldn't dare to admit to such a faux pas

).
So, IMHO, says he LOL'ing, what acronyms do you hate, and why? (I suppose that should be L'ingOL)
I hate all of them: I'm in engineering and there are far too many that get reused to even bother pretending to know what they mean.