Here is what I have accumulated so far.

ETS- Equipped to survive
BOB- Bug out bag
PSK- Personal survival kit
EDC- Everyday carry
FAK- First aid kit
SAR- Search and rescue
SAK- Swiss army knife
RSK- Ritter survival knife
UAV- Urban assault vehicle
SAS- Special air service
RCMP- Royal Canadian Mounted Police
CHP- California highway patrol
EBR- Energy bar wrapper (??)
WTF- What the...?
TSHTF (The Sh*t Hits The Fan)
TEOTWAWKI - 'The end of the world as we know it.’
LBTOJ, ‘little brown truck of joy’ ( UPS)
IMHO, ‘in my humble opinion’
OTHO, ‘On the Other Hand
POTUS, President of the United States
FWIW, For What it’s worth.
YASKT (Yet Another Survival Kit Thread)
IIRC ????????