First and foremost: Thanks to the hivemind for helping with this! And Thanks to @Linnet for first compiling the list and creating the post!
Remember the first time someone screamed "BRDM! It's a BRDM!", at you and you had no damn clue how you were supposed to react to this? Or what to look for? The list of abbreviations is damn long (and this one by no means complete! If you see something missing, suggest it in the comments please! Missing an abbreviation but you're not sure what it means? Add it, too! Chances are somebody will fill it in) and I'm 100% convinced that nobody knows every single one of them. This list - click here for the entire one in alphabetical order - may prove itself helpful for some of the FNGs in the future. Running away tactically retreating from something makes more sense when you know what the hell you're running from.
This list will be separated into 3 subsections, namely: Weapons, Vehicles and General Terminology.
NOTE: This part only focuses on vehicles. You can find Weapons here and General Terminology here
A:
AFV - Armoured Fighting Vehicle
APC – Armoured Personnel Carrier
ATV – All-Terrain Vehicle
B:
Before going over the list of amazingly alike sounding vehicles with the letter "B", take a look at the following picture. It provides a few useful points for telling them apart. Knowing what charges at you isn't the most unimportant thing to know. (also refer to this guide)
BMD – russian made Airborne amphibious tracked IFV
BMP – russian made Amphibious tracked IFV
BRDM – russian made Combat Reconnaissance Patrol Vehicle. A 4-wheeled lightly armored vehicle, with a turret on top, not to be confused with BTR-variants
BTR – russian made Armoured Personnel Carrier. Has many variants, with some being very deadly, for example BTR-80A has an autocannon on top
F:
FV – Fighting Vehicle
I:
IFV – Infantry Fighting Vehicle
K:
KNIGHT - A Callsign, refers to our armoured assets (may have different callsigns)
M:
MBT – Main Battle Tank
MRAP – Mine Resistant Ambush Protected vehicle (Also called “Battlebus”)
R:
RAPTOR - A Callsign, refers to our helicopters/planes (may have different callsigns)
S:
SPAA(G) - Self-Propelled Anti-Air (-Gun)
V:
Vic/Victor - Generally refers to a vehicle
Z:
ZU - Anti Air Turret which may be mounted on a vehicle
ZSU - lightly armoured, self-propelled Anti-Air vehicle (russian made, 4 23mm barrels and radar)
updated last on June 7th 2021 by @Silberjojo(send any feedback to him)