Stateless devices were cheaper and simpler to create, requiring less memory and processing to keep track of things.

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They've held "Vigils Against Violence" the last Sunday of every month and maintain justice4jenna.org, a Web site devoted to her memory and to the effort to track down her killer.

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"Within the living memory of all of us, Republicans were on track to become a permanent majority, " he said in a statement.

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She has memory issues because of her Asperger's, she said, and often loses track of time.

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For example, one day we might be able to design apps that allow people to probe their own cognitive abilities (processing speed, memory, decision-making, etc.) at any time during the day and track these abilities over the years, transmitting the results from their smartphones to a health care provider if desired.

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