What does IAC stand for?

Idle Air Control

I just got this email on my phone and figured id better report.
My engine had a, I don't know, rattle I guess. My power steering pump'* bottom mounting bolt was loose. After I tightened that up, the while in drive rpm issue stopped. It still does the in park RPM shuffle. I'm not sure why the PS pump being slightly loose would make it run funny. I was told it was perhaps tweaking my knock sensor.
I still have not had time to find out what is the problem in park.
Just so you all know what happened
Laterz
Oh P.*, I also ripped the metal connector out of one of my plug wires while checking plugs. That kind of sucked. I just jammed it in with needle nose pliers, and it seems to be good so far. I need to either track down my old plug wires for a spare, or see about buying a new one. Since they are all different lengths, how do I go about asking for the right wire.
I forget the cylinder #, but its the front one closest to the air box.
Thanks for the assistance.