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.
I’m going to answer the opposite question. My favorite acronym is TLA (three letter acronym)because it mocks the whole system.
I also love OOO specifically because it is ghosty.
There’s an RFC for TLAs: https://datatracker.ietf.org/doc/html/rfc5513