ISHM — the oldest petroleum industry school in the world devoted to fluid measurement and control.

Since its inception, except for four years, the School meets annually in the spring. Until 1972, the content of the Short Course included only Natural Gas Measurement, Flow Rate and Pressure Control. As the supply and demand problems in the United States worsened and imports of petroleum liquids increased, improved measurement practices became of paramount importance. The name changed to the International School of Hydrocarbon Measurement (ISHM), and the curriculum expanded to include the measurement and handling of all petroleum liquids, ranging from liquefied natural gas (LNG) to tar sand slurries.

Registrants from around the world now attend regularly.