ELI5: Explain Like I'm 5
Examples: vector calculus, jet engine, interbank network, morbidity and mortality, why the sky is blue

National Energy Modeling System

National Energy Modeling System (NEMS) is a computer system used by the United States government to make predictions about how much energy people in the United States will use in the future. It is like a giant video game where the government can play to make predictions about how people use energy in the future. By putting in different scenarios, like changes in the weather, population growth, or new energy sources, NEMS can help the government figure out how energy will be used. This helps policymakers plan for energy needs in the future.