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The users of mobile devices increasingly use networked services to address their information needs. Questions asked by mobile users are strongly influenced by contextual factors such as location, conversation and activity. The authors report on a diary study performed to better understand mobile information needs. Participants' diary entries are used as a basis for discussing the geo-graphical and situational context in which mobile information behaviour occurs. The suitability of user queries to be answered by a portable knowledge collection and web search are also considered.
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