Two user-oriented computer codes are presented for mapping the potential distribution of electrostatic fields using the IBM personal computer (PC). The codes are two-dimensional and were written in BASIC with a graphics capability suitable for the IBM PC. One of the codes uses a finite-difference approach to solve Laplace's equation as applied to any shape of a closed boundary geometry such as coaxial transmission lines or cylinders satisfying various boundary conditions. The other code is based on a finite element-moment method approach for solving Laplace's equations. As a result, it is applicable to any geometry with open or closed boundaries. An obvious limitation in the use of this code is the size of geometry which can be input, since the memory requirement of the finite element code is directly proportional to the size of the geometry. Therefore, in the case of closed geometries which are usually larger in size, the finite difference code is more suitable and complements the finite element code.
