By watching what people upload or who they follow, for example, Google can move towards a more personalized Web search inside the Gmail application.

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"Google has a chat application, Web-based search, and there is no one cohesive Google mobile application, which is important to have in a mobile environment where you want to be able to switch between applications, " she says.

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Also, this week Google announced Google Desktop, a free downloadable application that combines desktop search with a sidebar that links to Web searches and personal files.

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