The computer program simulates the operation of all electric utility generating units in the U.S. The Advanced Utility Simulation Model (AUSM) is documented in a series of 11 reports numbered EPA-600/8-88-071, volumes A through K. The model forecasts emissions, costs of electric generation and electric rate schedules by year and by state. Alternative emissions control scenarios, electricity growth rates, interest rates, and other economic parameters can be inputted by the model user to study their effects on electric utility construction and compliance strategies. Software Description: The model is written in the Fortran and TSO. CLIST programming languages for implementation on an IBM 3090 computer using the MVS-XA (VS Fortran Compiler) operating system. Memory requirement is 4000K bytes.