There must be numerous lists of commonly-used Usenet abbreviations scattered around the Web, but they still occasionally cause confusion, so here is a list of those which I have encountered fairly regularly in this or other newsgroups.
AIUI | As I Understand It |
AFAICT | As Far As I Can Tell |
AFAIK | As Far As I Know |
BTW | By The Way |
CFV | Call For Votes (e.g. on whether to create a suggested new Usenet group) |
FUBAR | F****d Up Beyond All Recognition |
FWIW | For What Its Worth |
HTH | Hope This Helps |
IIRC | If I Recall Correctly |
IMHO | In My Humble Opinion |
ISTM | It Seems To Me |
ISTR | I Seem To Recall |
LOL | Laugh Out Loud (curiously, the Dutch word 'lol' means 'fun') |
Ob- | Obligatory, as in "ObBirding". Indicates an on-topic comment at the end of an otherwise off-topic post. |
OP | Original Poster. (The poster of the first message in a thread.) |
OT | Off-Topic - i.e. not strictly relevant to the newsgroup (though some people seem to think it means On-Topic!) |
OTOH | On The Other Hand |
RFD | Request For Discussion |
RFI | Request For Information |
ROFL | Roll On the Floor Laughing (or ROTFL; there are also other variations) |
RTFM | Read The F**** Manual |
SBC | a uk.r.b in-joke: the Senile Birders Club |
TIA | Thanks In Advance |
TTFN | Ta Ta For Now |
URL | Uniform Resource Locater (= Internet address - the bit that is preceded by "http://") |
VBG | Very Big Grin |
YMMV | Your Mileage May Vary (= your experience may differ) |