It is our intention to challenge the commonly held assumption that information systems development (ISD) can be conceived of as a normative process reflecting conventional economic rationality. We ask: is systems development the rational process so eloquently described in the ‘classic’ works of DeMarco (1978), Gane and Sarson (1979), Weinberg (1980), Yourdon (1982), Jackson (1983), and Martin (1985)? Or does this orthodox view fail to explain the actual practice of systems development? It is our view that even the basic assumptions about the rationality of the actors and the social processes they engage in need to be critically appraised. We suggest that if the assumptions about economic rationality are closely analyzed, it can be seen that they do not reflect the reality of systems development. ISD tends to defy rational explanations. As an alternative to basing our understanding of systems development on economic rationality, we contend that symbolism holds more promise. Instead of focusing on data flow diagrams, structured walkthroughs, requirements specifications, and the like, we concentrate on the role of myth, metaphor, and magic. These concepts offer considerable scope in interpreting the social actions that are embodied within ISD. We feel they facilitate a much richer understanding of systems development.