Teman-teman tentu sering mendengar kata-kata FYI, BTW, IMHO dll ketika berinteraksi dengan teman-teman di dunia maya, terlebih bagi yang suka chat/milist dg orang luar negeri.
Karena kata-kata tsb asing, terkadang membuat kita bingung, apa maksudnya? Berikut saya cuplikkan beberapa kata yang sering digunakan dalam berinteraksi tulisan (korespondensi) dg orang lain di dunia maya:

AFAIC As far as I’m concerned
AFAIK As far as I know
AFK Away from keyboard
BRB Be right back
BTDT Been there, done that
BTW By the way
BUAG Butt-ugly ASCII graphic
C/C Comments and criticism
EOM End of message
FAQ Frequently Asked Question. When people say “the FAQ”, they are generally referring to a list of answers to Frequently Asked Questions. These are posted monthly on many newsgroups or mailing lists to reduce discussion of topics that have already been thoroughly covered. It’s a good idea to look at a FAQ file for a newsgroup or mailing list before participating in it. For help in finding FAQ files, see Where can I find a repository of Usenet FAQ files? A large list of all known FAQ postings in newsgroups is also posted periodically in the Usenet newsgroup news.admin.
FTFY Fixed that for you; often accompanied by a correction
FTW For the win
FWIW For what it’s worth
FYI For your information
GUI Graphical user interface
HTH Hope this helps
IANAL I am not a lawyer
IIRC If I recall correctly
IMHO In my humble opinion
IMNSHO In my not so humble opinion
IMO In my opinion
IOW In other words
l33t or 1337 From “elite”. This has become a term used to describe the informal communication of Internet gaming. L33t speak is easily identified by the substitution of number and other characters for regular letters; e.g., hackers becomes h4XX0rz.
LFG Looking for group, usually used in MMORPGs
LMAO Laughing my butt off
LOL Laughing out loud
MMORPG Massive, multiplayer, online role-playing game, such as World of Warcraft or Star Wars Galaxies
MOTAS Member of the appropriate sex
MOTOS Member of the opposite sex
MOTSS Member of the same sex
NG Newsgroup
n00b From “newbie“, meaning a newcomer not yet familiar with the rules
NT No text; usually in the subject line of a message with no body
OMG Oh my God
OTOH On the other hand
PWN Usage of the term “own”, as in “I PWNed you!”
QQ Cry more, noob (representation of eyes crying, often found in MMORPGs)
RL Real Life, as opposed to the Internet
ROFL Rolling on the floor laughing
ROFLMAO Rolling on the floor laughing my butt off
RTFM Read The Fine Manual. This may be interpreted as: “You have asked a question which would best be answered by consulting the manual (or FAQ, or other help files), a copy of which should be in your possession. The question you have asked is clearly answered in the manual and you are wasting time asking people to read it to you.” It’s good netiquette to mail this type of answer to another user rather than post it in public messages.
SO Significant other, used to refer to someone’s romantic partner without making any assumptions about gender or legal status
TLA Three letter acronym
TTFN Ta ta for now
TTYL Talk to you later
W/E Whatever
w00t An expression of joy
WFN Wrong forum, noob
WTF What the heck
WYSIWYG What you see is what you get, pronounced as “wizzywig”.
YMMH You might mean here
YMMV Your mileage may vary
{g} Grin
{BG} Big grin

Dengan kita mengerti bahasa/frase dalam berkorespondensi tersebut kita akan mudah memahami apa yang dimaksud oleh teman kita, jangan sampai yang diseberang lagi marah, kita anggap lagi tertawa…(joko sembung bawa gitar …nggak nyambung, jreng..)

Mungkin teman yang lain punya kata2 yang lain, silahkan ditambahkan.

Semoga bermanfaat…