An RN is a "registered nurse", someone who has been through a two year Associate Degree type program, or, in some cases, through a diploma process. A BSN is a "Bachelor of Science in Nursing," usually earned through a four year degree program. The advantage of training as an RN is that you can enter the job market more quickly and start earning sooner. The advantage of the BSN route is that while you have an extra two years of school, your earnings afterwards will usually be higher. As in so much of life there is a trade-off between short and long term benefits. Schools and hospitals have begun to recognize a demand among RNs for continuing education, and in response have instituted RN to BSN Nursing Programs. These are especially set up so that those who have the first qualification can study for the second. They can be full or part time, on campus or mostly by distance learning, whatever best suits the student. There is often credit given for work experience and for any other academic studies that have been completed. BSN graduates are able to move into the management area, climbing the career ladder. That extra education could be a valuable investment in your career particularly as many schools organize things so that you can keep working while you study.