Along with the dirty diapers, rumpled newspapers and greasy food wrappers, airline passengers are leaving something else behind in those seat-back pockets: iPads.

This week's Middle Seat (click here to read) reports that airlines are now warehousing hundreds of left-behind iPads, Kindles and other tablet computers and readers forgotten by travelers. Carriers try to reunite the devices with their owners but are often thwarted by password protection and Apple Inc.'s reluctance to track down owners based on serial numbers.

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