Chattanooga Modular Modelers, CMM, Inc., is a not-for-profit Tennessee corporation headquartered in Chattanooga, Tennessee that is has been awarded 501 (c) (3) Non-Profit Charity status by the IRS. We are chartered with the mission to educate the public about the railroads' roles in building this nation and the southeast Tennessee manufacturing base; to display artistic expression through the mastery of the many skills necessary to complete a model railroad or diorama. In addition, we will instruct interested persons how to design, build and maintain the hardware, electrical and electronic equipment that brings the art of model railroading to life.