A review of the evolution of research on information Technology Acceptance Model

many research models about Information technology (IT) acceptance have yielded, and each with different sets of determinant factors of user acceptance behavior. In this paper, we review user acceptance literature and discuss four important models: Technology Acceptance Model (TAM), The Extension of the Technology Acceptance Model (TAM2), the Unified Theory of Acceptance and Use of Technology (UTAUT), and Technology Acceptance Model 3 (TAM3). All the evolution process focus on the key point that usage behavior are mediated by intention to use. Also we have made comparative analysis to their main determinants and made several recommendations for future research.