Using RSVP abbreviation as UI element

Our software deals with managing event attendance, so that manager can see how many people accepted/rejected/not responded to the invites.

So the question is the "RSVP" abbreviation popular enough, that (english speaking) people will understand what it means?

English is not my native language, so when I first saw this abbreviation it was very confusing to me, especially considering that it's abbreviated from French.