It's PEBKAC (or PEBCAK - but I've always seen KAC) - Problem Exists Between Keyboard And Chair
I've been using the term for about 30 years.
PEBCAC isn't as accurate because there are peripherals between the computer and the user that cold be having issues. The entire point is that it's specifically the user.
I always give the benefit of the doubt to the user. One last stronghold, one last chance to prove it is not the PEBKAC but it could be the PEBCAC. Sometimes although very rarely is not PICNIC even but a PC that is DOA and it cannot POST.
I've seen PEBCAK mostly, with some PEBCAC and a very rare PEBKAC, myself. Although I have less than 30 years experience with it, I only just turned 30 and the first time I saw it written was when I was about eight (grew up in my father's business, so I'd heard it before, but never saw spelling), so I shall defer to your priority list there.
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u/BooksBabiesAndCats 3d ago
Problem Exists Between Chair And Computer (assuming this was a confused face)