BFN bye for now 

BTW by the way

CUA commonly used acronym(s) OR common user access

FAQ frequently asked question 

FUD (spreading) fear, uncertainty, and disinformation 

FWIW for what it's worth 

FYI for your information 

GR&D grinning, running, & ducking 

HTH hope this helps 

IAE in any event 

IANAL I am not a lawyer (also IANAxxx, such as IANACPA) 

IMCO in my considered opinion 

IMHO in my humble opinion 

IMNSHO in my NOT so humble opinion 

IMO in my opinion 

IOW in other words 

LOL lots of luck or laughing out loud 

MHOTY my hat's off to you 

NRN no reply necessary

OIC oh, I see!

OOTB out of the box (brand new)

OTOH on the other hand

OTTH on the third hand

PMFJI pardon me for jumping in

ROTFL roll(ing) on the floor laughing (also, ROF,L, ROFL)

RSN real soon now (which may be a long time coming)

SITD still in the dark

TANSTAAFL there ain't no such thing as a free lunch

TIA thanks in advance

TIC tongue in cheek

TLA three-letter acronym (such as this)

TTFN ta ta for now

TTYL talk to you later

TYVM thank you very much

W4W (WP4W, etc.; all the various products, such as...)

WYSIWYG what you see is what you get