What's the meaning of this ... term, abbreviation, acronym, whatever?
I've got a short list started and I'll add more as they come to me (or you fling them at me).
There are whole sites devoted to this stuff - I'll add links to them as I find 'em. And please send me your suggestions for those too!
Common newsgroup abbreviations and acronyms
ISTR = I Seem To Recall
IIRC = If I Recall Correctly
(do newsgroup users have memory problems?)
IOW = In Other Words
Common file formats
PDF = Portable Document Format produced by Adobe Acrobat software and others