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.
“www” for World Wide Web has always bugged me. World Wide Web is three syllables, WWW is nine.
I’ve even heard people say “Double-yoos dot”, and even that compressed version is still more syllables than the full thing.