I am about to start school to become a RN(BSN) and I was wondering How does an RN obtain their specialty? I have been looking around at jobs and the show RN jobs with designators like ER, PACU, PICU, NICU etc... How does an RN obtain these designators or specialties? I know what they stand for and NICU seems to be what I would most enjoy doing. I was needing to know do I take classes in college directed towards where I want to work in a hospital or is it an additional schooling I need to take? Any help would be much appreciated...