abbreviation used in sms and instant messaging (basics)

:) => Smile
:)) or :D => Happy
:( => Sad
:'( or :-( => Crying
<3 => heart
</3 => broken heart 
:P => tongue
;) => wink
8) => cool
gm => good morning 
ga => good afternoon
ge => good evening
gn => good night
sd => sweet dreams
tc => take care
jsk => jay shri krishna
ttyl => talk to you later
hf => have fun
w8 => wait
ri8 => right
gr8 => great
mua => meet you again
brb => be right back
lol => laugh out loudly
rofl => rolling on floor laughing
lmao => laughing my arse off
omg => oh my god
bt => but
d => the
gtg => got to go
cul => catch you later
btw => by the way
asap => as soon as possible
5n/f9 => fine