So, now we know that Target's card customers just got siphoned up. Guess what OS that POS (in both senses of the acronym) runs? Yup.
"Each of our server endpoints and each of our 5,400 POS registers has a System Center Operations Manager agent installed. That way, we can ensure the checkout experience for our guests remains fast and efficient."
That's a M$ page, and it's sort of surprising they haven't taken it down.