That "R" stands for REALTOR®.
The Realtor® trademark is a service mark used for a licensed real estate professional affiliated with the National Association of REALTORS® signifying adherence to a strict Code of Ethics. It’s a commitment to honesty, integrity, and trust that’s been protecting property owners like you since 1913. Members of the South Padre Island Board of REALTORS® are real estate professionals who subscribe to the National Association of REALTORS® strict code of ethics. It is the Code of Ethics that separates REALTORS® from real estate agents.
REALTORS® are more than a group of credentialed real estate professionals. REALTORS® also help build a better world through their involvement within the community.