I don't know what the letters actually stand for but that is what I get when they pull my report. I would love to know what that acronym is too.
When they pull mine to investigate it just says CBC Consumer Investigation..with no abbreviation or anything. I have about 5 of those for various disputes I've done...but this is the first of this one I've ever seen.
I have a few on my equifax...I think they are for mainanence of your account...I tend to see them when they have deleted or verified something