The IGW and MAGNET platform enable real-time interactive modeling with the users being "in the loop" or dynamically-engaged throughout the computational process. Users not only solve equations or analyze data that results from computing, they can interpret what is happening to the data as computing/simulation occurs. They can steer calculations in real-time; they can change assumptions, conceptual framework, resolution, or representation, and immediately see the integrated effects, the ultimate implications, and the complex interrelationships presented intelligently in a meaningful context. Users become equal partners with the computer, interact on-line with their data, and drive in real-time the scientific discovery or problem solving process.