The School is the largest gas measurement school in the United States that is devoted to natural gas measurement, pressure regulation, flow control, and other measurement related arenas. It is divided into seven main subject groups: Fundamental Measurement, Gas Quality, Distribution, General and Advanced Measurement, Transmission, Office Procedures and Accounting, and Hands-On training. Since 1966, the School has been held annually during the month of September in Houston, Texas, the energy capital of the world.