The National Model Railroad Association (NMRA) is a nonprofit organization founded in 1935 that promotes the hobby of model railroading. It provides resources, standards, and guidelines to help hobbyists build and operate model train layouts. The NMRA also organizes events, conventions, and competitions to foster community among model railroad enthusiasts. In addition to supporting individual hobbyists, the NMRA works to establish industry standards for model trains and accessories. This ensures compatibility and quality across different manufacturers. The organization also offers educational materials and certification programs to enhance skills and knowledge in the field of model railroading.