42 consultation services rendered to third parties on the production of energy, the distribution and transmission of electricity, and the storage and transportation of fuels, namely, gasoline, fuel oil for heating and internal combustion, kerosene, propane, natural gas, coal, diesel fuel, marine fuel and aviation fuel; leasing services for computer-related consumer products relating to hydrocarbon fuels and electricity, namely, computer-related energy conservation equipment, metering equipment, circuit breakers, switch boxes and transformers