another meaning for PR

When I think of "PR", I think of "public relations" or "Puerto Rico", but I just found out from an American who recently spent some time in Singapore that "PR" means "permanent resident". So when a Westerner is seen frequently walking around Singapore or regularly goes to stores or restaurants, people will ask him if he's a "PR" or just visiting. I've been to Singapore, but I guess I wasn't there long enough to be asked this question. But then again, I don't know if there are as many Western females there as men, since I think it's more common for guys to marry the women from there and stay.