Xenos (X-ray/electron numerical optimization suite) is a suite of advanced 2D/3D finite-element programs that handles everything you want to know about X-rays and electrons. Component programs calculate electric fields, magnetic fields, charged-particle dynamics, electron-photon-positron transport in materials and thermal transport. The diagram on the right shows how the programs communicate to form an integrated package. The system geometry is defined in the interactive graphical environment of Geometer. MetaMesh uses the information to create conformal meshes of hexahedron elements for the solution programs. The same or different meshes may be used to define 1) electrodes and dielectrics for electrical field calculations (HiPhi), 2) coils, iron and permanent magnets for magnetic field calculations (Magnum), 3) elements and compounds for Monte Carlo radiation transport (GamBet) and 4) solid materials for thermal transport (HeatWave). Xenos includes a parallel set of programs for 2D calculations. There are several pathways for interactions between the 2D and 3D programs. The Xenos software suite has unprecedented power to model X-rays, electrons and their interactions. Components function as coupled or stand-alone applications for electric and magnetic field calculations, electron beam design, Monte Carlo modeling of radiation transport and thermal analysis. No other software compares for advanced features, accuracy, speed and price.