In this paper, we conduct a thorough investigation of how people search their photo collections for events (a set of photographs relating to a particular well defined event), singles (individual photographs) and properties (a set of photographs with a common theme) on PDAs. We describe a prototype system that allows us to expose many issues that must be considered when designing photo searching interfaces. We discuss each of these issues and make recommendations where applicable. Our major observation is that several different methods are used to locate photographs. In light of this, we conclude by discussing how photo searching interfaces might embody or support such an approach.
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