I just did a quick survey of my office, and the consensus is the proper term for the license sticker here is "Tab."

Which I find kind of weird... until I read this thread, I didn't think twice about calling them "Tabs". I'm guessing it might be a regional thing.

That said, thanks for the reminder. My "tabs" expire end of next month...

EDIT: It appears I am not the only one who thinks they are called "TABS"