FC-Compiler (tm) is a Calculus-level Compiler, helps Tweak parameters.. The FortranCalculus (FC) language is for math modeling, simulation, and optimization. FC is based on Automatic Differentiation that simplifies computer code to an absolute minimum; i.e., a mathematical model, constraints, and the objective (function) definition. Minimizing the amount of code allows the user to concentrate on the science or engineering problem at hand and not on the (numerical) process requirements to achieve an optimum solution. FC-Compiler has many (60+) example problems with output (see Demos) for viewing and getting ideas on solving your own problems. These are improved productivity examples do to using Calculus-level Problem-Solving. Please share this Calculus Problem-Solving tool with your friends. Thanks! Industry problems with solutions over the past twenty plus years have been put into a textbook to show the power of Calculus-level Problem-Solving. The textbook as on our website at goal-driven.net/textbooks/. The software architect behind Calculus Compilers was Joe Thames. Help future science & engineers get jobs upon graduation. With usage of the FortranCalculus compiler, one increases their productivity by a factor of twenty! Please visit our textbook at goal-driven.net/textbooks/. Thanks! 50+ Optimization Demo problems Solved, included with FC Compiler are: 3 Stage Rocket Design Optimization; AC Motor Design to Maximize Efficiency; Analysis using Monte Carlo; Bang Bang Control motor; Chemical kinetics parameter estimation; Pilot Ejection Simulation; Wing design optimization.