Computer-based information search services (ISSs) of the type that provide online literature searches are analyzed from a systems viewpoint using a continuous simulation model. The methodology applied is "system dynamics," and the system language is DYNAMO. The analysis reveals that the observed growth and stagnation of a typical ISS can be explained as a natural consequence of market responses to the service together with a business orientation on the part of the funder. An analysis of managerial decision-making is also presented, and implications for the aggregate information search market are explored. It is claimed that the growth potential has been overestimated and that a decline in the aggregate growth rate is likely, though not inevitable. (Author)