Technology adoption is one of the mature areas of IS research. Research in this domain has evolved over time by conceptualizing new factors which can better explain the phenomena of technology adoption resulting in development of several theories and models. This process of evolution has been primarily driven by rapidly changing technology scenario and has led to new factors which are grounded in theory from other disciplines. In this paper, we strive to trace the evolution of various theories and models of technology adoption over the years with the objective of presenting an overview of this important domain to the researchers who intend to apply these models in their research. We also look at need for identification of new factors in the technology adoption models in wake of rapid technology changes in future.