There are several thousand group support systems (GSS) installations worldwide, and while that number is growing, GSS has not yet achieved critical mass. One reason may be that it can take one to three years for an organization to complete a transition to or diffusion of GSS. Several competing models of adoption and diffusion, technology acceptance, and technology transition exist in the literature. This panel will report on recent work that expands and clarifies the models. Competing approaches will be discussed and debated. The goal of this panel is to focus the discussion of differing GSS adoption models and promote additional research using recently evolved models.