Although called systems, information systems in organizations are often viewed as tools that "users" use. IS success is often gauged as though it were about acceptance and usage of a tool. System development is often conceived as buildingcomputerized tools that satisfyinformation requirements of idealized business processes. Frequent IS disappointments and occasional failures are often attributed to inadequate user involvement, and even users involved in the projects often admit difficulty contributing fully to these technical discussions. This paper argues that the current balance between tool thinking and systems thinking in IS practice and research is slanted toward tool thinking, and that the IS discipline has done far too little to exploit the system nature of systems in organizations. Progress in that direction would fully recognize the sociotechnical nature of systems in organizations, thereby encouraging richer systems thinking than is possible in practice or in rese...