The accuracy of analytical modeling of complex Shear Wall Systems has always been of concern to the Structural Engineer. The computer models of these systems are usually idealized as line elements instead of continuum elements. Single walls are modeled as cantilevers and walls with openings are modeled as pier/spandrel systems. For simple systems, where lines of stiffness can be defined, these models can give reasonable results. However, it has always been recognized that a continuum model based upon the finite element method is more appropriate and desirable. Nevertheless this option has been impractical for the Structural Engineer to use in practice primarily because such models have traditionally been costly to create, but more importantly, they do not produce information that is directly useable by the Structural Engineer. However, new developments in ETABS using object based modeling of simple and complex shear wall systems, in an integrated single interface environment, has made it very practical for Structural Engineers to use finite element models routinely in their practice.