Thanks go to the original list posted in Pyramid Temple Vault. With a couple additions that I thought might be helpful, here is the list of useful Acronyms and Abbreviations. If you see anything missing, please post a reply so that we can make this list even more comprehensive.
GW: Games Workshop
SoC: Storm of Chaos
Race Abreviations:
Beasts of Chaos: BoC
Bretonnia: Bret
Chaos Dwarfs: CD
Daemons of Chaos: DoC
Dark Elves: DE
Dwarfs: n/a (occasionally stunts)
Empire: Emp
High Elves: HE
Lizardmen: LM
Ogre Kingdoms: OK
Orcs & Goblins: OG
Skaven: n/a
Tomb Kings: TK
Vampire Counts: VC
Warriors of Chaos: WoC
Wood Elves: WE
Specific Army List Abreviations
AoS: Army of Sylvania, a Storm of Chaos army for Vampire Counts
LSG: lorthern sea guard, a Storm of Chaos army for High Elves
SCE: Skaven Clan Eshin, a Storm of Chaos army for Skaven.
CoP/CoS: Cult of Pleasure/Slaanesh a Storm of Chaos army for Druchii
DSA: Dwarf Slayer Army, a Storm of Chaos army for Dwarves
RAF: Royal Air Force, a Bretonnian army consisting of a large amount of Pegasus Knights
SAD: Shooty Army of Death, a Skaven army utilizing large amounts of magic and shooting
MSU: Many Small Units.
FLU: Few Large Units.
Lizardmen Specific Abbreviations
FSoD: Flying Skink of Doom, a skink chief with a cloak of feathers, for warmachine and mage hunting
JSoD: Jaguar Saurus of Doom, also known as the Nike Saurus, armed with the jaguar pendent and a great weapon
CoR: Cold One Riders (also SCoR)
SCoR: Saurus Cold One Riders (also CoR)
Steggie: Stegadon
Terrie: Teradon
Sallie: Salamander
Chamo: Chameleon Skink
Javs: Javelins
BP: Blowpipe
GW: Great Weapon
HW: Hand Weapon
MoOO: Mark of the Old Ones
CoF: Cloak of Feathers
SoSR: Scimitar of the Sun Resplendent
VotFF: Venom of the Firefly Frog
General Terms
BRB: Big Rule Book
SRB: Small Red Book
BSB: Battle Standard Bearer
CC: Close combat
CR: Combat Resolution
FC: Full Command
R&F: Rank and File troops
Cav: Cavalry