Muzzies: many of those in the UK came from Turkey or Saudi Arabia, both allies of the USA during the cold war. First world, third world etc. Are cold war terminology, and by that the sauds and Turks are or rather were from first world countries.
2. Poles. Communist Poland was a Soviet vassal, so second world.
3. Third world were non aligned countries, so included Switzerland and Sweden..
President Ford didn't seem to think so. (I still believe that one statement cost him the election, and gave us four years of Carter)