The abbreveiations that I know.

WIP > Work In Progress (got 3 of them!)
UFO > Unfinished Fabric Object (got 3 of them too!!)
OBW > One Block Wonder (very mysterious!)
D9P > Disappearing 9 Patch ( 1 of my WIP's)

The ones I have figured out, but not sure of.

DH > Dear Husband
DD > Dear Daughter
DIL > Dear Daughter In Law

And that's the extent of it!! Need help to grow my list!!!! Can You help me grow my list??!! Thanks in advance!!