This article develops a model of adoption and continued use of knowledge management systems (KMSs), which is primarily built on Rogers’ (1995) innovation stages model along with two very important social psychology theories—Ajzen and Fishbein’s (1980) theory of reasoned action (TRA) and Davis’s (1986) technology acceptance model (TAM). It presents various factors and variables in detail. Hypotheses are developed which can be tested via empirical study. The proposed model has both theoretical and practical implications. It can be adapted for application in various organizations in national and international arena.