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And Cynthia Typaldos has been asking and answering those questions for years. A software developer by training, she earned an AB in chemistry at UC Berkeley and attended graduate school in computer science there as well. Later, she held senior-management positions at Data General and Sun Microsystems. Then she got with the Web program. As she worked to develop the Players Club, Typaldos thought more and more about how online communities evolve and about what it takes for them to thrive.