Microsoft has detailed the new multitasking system for Windows Phone 7.1 "Mango", and it seems the company has been looking long and hard at both iOS and webOS for its inspiration. Like iOS, Mango will make use of frozen app states to conserve memory and prevent a background app from running away with all the CPU cycles; like webOS, however, it will have a system of card-like app previews which can be paged through to jump between software.

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