Knowledge has long been identified as a key resource for organizations. Due to recent technological convergence and cost reductions, information and communication technologies (ICT) have renewed focus on organizational knowledge assets and how to manage them. Knowledge management systems (ICT systems that capture, store and distribute the knowledge of the firm) have been popularized in the national press, and consulting firms are racing to market technical knowledge solutions to their clients. However, what is the difference between a knowledge management system and a traditional information system, and does this distinction matter? The purpose of this paper is to clearly delineate the similarities and differences between these systems, and I argue that in fact, the distinctions are critical to both the performance of the knowledge management system as well as the success of the organization.