This project will provide the capability of modeling of electromagnetics in systems with highly disparate space and time scales. This will enable computing the interference by incident electromagnetics on electronic components inside of shielded volumes. The interference arises because the electromagnetic radiation is able to leak through the seams and of such enclosures as well as through small gaps between, e.g., insulated wiring and the enclosing case. The models will cover these large disparities while being accurate and fast, able to be run in a modest workstation. A variety of methods will be use to effect this. Included among those are device computing, highly variable meshes, and implicit solvers. The result will be a robust modeling application usable by DoD contractors as well as those in the commercial sector.