What does the "IC" stand for on the frequency list?

[geoflyer]

So this is a question that's been plaguing a friend and I.  Under the list of frequencies for KSFO there's a few that look like this:

IC:    134.5 351.8
ILS PRM RY 28L IC:    120.5
LDA PRM RY 28R IC:    120.5

Now, I know what PRM is, but our question is what does the IC stand for?  No one seemed to know, and the A/FD was not helpful, so I figured I'd turn here for help.  Thanks!   

[dljone3]

IC = Initial Contact. IIRC this is the first controller to contact when approaching a Class B/C airport's controlled airspace. Larger airports usually have multiple IC frequencies.

[geoflyer]

Ah HAH!  That makes so much sense. 

Thanks so much for the help!