Mine is OOO for Out Of Office. I always misread it in my head like a ghost and it takes me a few seconds to process. It also doesn't translate to speech—you have to say the whole thing.
Interested to see if others have similar acronyms they beef with.
After 20 years in EMS, (see how it starts immediately - Emergency Medical Services), The whole bloody damned field is nothing but acronyms for as far as the eye can see.
From BPM - Beats per minute, to ABC - Airway, Breathing, circulation, (which today is more like ACB - Airway, Circulation, Breathing) to OPQRST - Onset, provoke/pallation, Quality, Region/Radiation, Severity, Time to A-Fib - Atrial Fibrillation to SOB - Shortness of Breath.