Similar to a pebcak error. ID-10-t is idiot with a 10 instead of io in the middle.
computer user: I can't get my computer to work. The coofe cup holder is broken.
Helpdesk: Coffee cup holder?
Computer user: Yeah, my new computer has a coffe cup holder. You press a button and a tray comes out to place a coffe cup on.
Helpdesk (on mute and to a coworker): Hey Phil, I have a an ID-10T error on the phone. To computer user: Ma'am, That is not a coffee cup holder, that is your cd-rom.
Computer user: Oh. Are you sure?