Simulation has a long history in the field of Information Retrieval. More than 50 years ago, contractors for the US Office of Naval Research (ONR) were working on simulating information storage and retrieval systems. The purpose of simulation is to predict the behaviour of a system over time, or under conditions in which a real system can't easily be observed. My talk will review four general areas of simulation activity. First is the simulation of entire information retrieval systems, as for example exemplified by Blunt (1965): A general time-flow model has been developed that enables a systems engineer to simulate the interactions among personnel, equipment and data at each step in an information processing effort. Information retrieval; Simulation; Modeling.
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