Fortran Calculus Compiler descriptions Fortran Calculus Compiler: Calculus level computer languages are Fortran Calculus & PROSE. Both languages are based on what is called Automatic Differentiation . Calculus languages simplify computer coding to an absolute minimum i. e. a mathematical model constraints & the objective function. Minimizing the amount of code allows the user to concentrate on the science or engineering problem at hand & not on the process requirements to achieve an optimum solution. Major benefits from AD based software are: o Determines Optimal solutions o Allows Rapid Model Prototyping o Accelerates Problem Understanding o Increases Engineering Output & Quality o Reduces Time Costly Problem / Solution Cycle Fortran Calculus was designed to solve implicit problems. Implicit problems are abundant in every branch of science & technology the most common being data fitting problems. Simulation programs can be elevated to optimization programs by using the FIND statements. An example circuit simulation program was converted & showed a 90% reduction in development time. Simulation conversions seem to have the most to gain besides those problems that can only be solved with this tool. PDEs ODEs & Algebraic equations can be solved. For cost savings optimum solutions & increased engineering output consider Fortran Calculus.