Exploratory Search : Beyond the Query response Paradigm Introduction Overview Background Emerging interest in exploratory search Structure of the lecture Defining exploratory search Problem context Search process Modeling exploratory search behavior Exploratory browsing Focused searching Differentiating exploratory search Summary Related work Curiosity exploratory behavior and browsing Information foraging Berrypicking Sense making Information seeking processes and behaviors Cognitive information retrieval Positioning exploratory search Summary Features of exploratory search systems Support querying and rapid query refinement Offer facets and metadata based result filtering Leverage search context Offer visualizations to support insight decision making Support learning and understanding Facilitate collaboration Offer histories workspaces and progress updates Support task management Summary Evaluation of exploratory search systems Metrics Methodologies Summary Future directions and concluding remarks Future directions Novel interaction paradigms Context awareness Task adaptation Decision making support and what if analysis Beyond the personal computer Collaborative and social search Learning about new domains New evaluation paradigms Concluding remarks Acknowledgments References Author biographies As information becomes more ubiquitous and the demands that searchers have on search systems grow there is a need to support search behaviors beyond simple lookup. Information seeking is the process or activity of attempting to obtain information in both human and technological contexts. Exploratory search describes an information seeking problem context that is open ended persistent and multifaceted and information seeking processes that are opportunistic iterative and multitactical. Exploratory searchers aim to solve complex problems and develop enhanced mental capacities. Exploratory search systems support this through symbiotic human machine relationships that provide guidance in exploring unfamiliar information landscapes. Exploratory search has gained prominence in recent years. There is an increased interest from the information retrieval information science and human computer interaction communities in moving beyond the traditional turn taking interaction model supported by major Web search engines and toward support for human intelligence amplification and information use. In this lecture we introduce exploratory search relate it to relevant extant research outline the features of exploratory search systems discuss the evaluation of these systems and suggest some future directions for supporting exploratory search. Exploratory search is a new frontier in the search domain and is becoming increasingly important in shaping our future world