41 US 100 101 107. G and S: Educational services, namely, organizing and facilitating conferences, classes, seminars, training, and workshops, in the fields of energy, architecture, engineering, environmental services, infrastructure, power generation, fuels, fueling systems, fleet operations, mass transit, program management, transportation, mass transit, automotive, agriculture, aerospace, waste, real estate development, renewable energy, fuels, energy storage, communications, investment, technology, information technology, and policy