Gordon Bell, 79, doesn’t expect to die anytime soon. But when the time inevitably comes, his grandchildren—and, when they’re born, his great-grandchildren and their children—will have an insight into his life that few descendants ever get.

For nearly 15 years, Bell, researcher emeritus at the Microsoft Research Silicon Valley Laboratory, has been painstakingly digitizing and categorizing his life, storing personal and professional moments as part of a “lifelogging” project done in conjunction with a Microsoft research program called MyLifeBits.

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