Alphabetical Index:

A

addy -- Address

AFAIK -- As Far As I Know

AFAICR -- As Far As I Can Remember

afk -- Away From Keyboard

ASAP -- As Soon As Possible

atm -- At The Moment

B

bbiaf -- Be Back In A Few [minutes]

bbiah -- Be Back In An Hour

bbiam -- Be Back In A Minute

bbias -- Be Back In A Second

bbs -- Be Back Soon

brb -- Be Right Back

BTW -- By The Way

C

CTCP -- Client To Client Protocol

D

DCC -- Direct Client to Client

d/l -- Download

E

EFnet -- Eris-Free net [the largest IRC network]

ETLA -- Extended Three Letter Acronym (an acronym of more than three letters)

F

fubar -- f***ed up beyond all repair

FYI -- For Your Information

FWIW -- For What It's Worth

G

H

HTML -- HyperText Mark-up Language

I

IMHO -- In My Humble Opinion [In My Honest Opinion]

IMO -- In My Opinion

IP -- Internet Protocol [IP address: numerical internet adddress]

IRL -- In Real Life

J

j/k -- Just Kidding

K

L

LTNS -- Long Time No See

M

MHO -- My Humble Opinion [My Honest Opinion]

MYOB -- Mind Your Own Business

N

NMF -- Not My Fault (or "Not My Footnote" - this is a newsgroup TLA)

O

P

Q

R

re -- short for "re-hi"; hello again (sometimes also used to mean "about")

RL -- Real Life

S

T

TCP/IP -- Transmission Control Protocol over Internet Protocol

thx -- Thanks

TLA -- Three Letter Acronym

tyt -- Take Your Time

U

u/l -- Upload

URL -- Uniform Resourse Locator [Address suitable for a web browser]

V

W

w/ -- With

wb -- Welcome Back

Web -- see WWW

w/o -- Without

wrt -- With Respect To [With Regard To]

WWW -- World Wide Web

X

Y

YMMV -- Your Mileage May Vary

Z