CTKI is the tech-tarded USER that TECHS spend so much company time dealing with that could be better spent on more important network issues.
TECH: "No, networks fine. Is your Caps Lock on?"
USER: "Oh my gosh, it IS, tee-hee! Sorry for calling you from your lunch break as an emergency."
(Boss comes in): "So USER tells me there's network problems and they can't log in! What's going on with the system?"
TECH: "Problem solved. But I think it would be in your best interest to replace the CTKI."