I did not know the concept of "professional engineer" (I am from Europe). We just have engineers, which in practical terms does not mean much, just that you fin

I did not know the concept of "professional engineer" (I am from Europe). We just have engineers, which in practical terms does not mean much, just that you finished a school which is entitled to give you such a title. Then hopefully you are educated enough to sign off that bridge. I read about Professional Engineers but I do not understand how different it is from "experienced engineer". It surely cannot be the exam, or otherwise the other engineers would be "Amateur Engineers" without any rezl use?