[HOMEWriter]

These are the ones I use the most, or have seen the most - there are more. Most of them are just basic phrases that have been shortened to letters.

dd = dear daughter
ds = dear son
dh = dear husband
mil = mother-in-law
fil = father-in-law
bil = brother-in-law
sil = sister-in-law
FYI = for your information
IMHO = In my humble opinion
ISO = in search of
BTW = by the way
FWIW = for what it's worth
KWIM = know what I mean?
LOL = laughing out loud
ROTFLOL = rolling on the floor, laughing out loud
LMBO = laughing my butt off (some people will use "A" instead of "B")

Hope that helps!
(that would be "HTH"!)

Kelly H.