"Fields and Electrodynamics" details numerical methods usually used in practice to calculate electromagnetic fields, and integrates these methods with computer simulation. The basic mathematical methods which physicists use to describe fields (eg density, displacement, and electrical) are developed, each demonstrated with examples of applications to mechanical problems. Maxwell's equations governing electric and magnetic fields are described and the reader is shown how these lead to physical phenomena such as electromagnetic waves, charged particle motion, electromagnetic induction, and other processes. Maxwell's equations are introduced in a discrete form - on a lattice - and are discussed in terms of the original definition of the polarization field rather than the more abstract "dipole moment" approach. Other topics covered include xerography, EMP, the magnetron oscillator, and boundary-value problems in the presence of superconductors, none of which are included in other texts at this level.