Barnes & Noble Inc. struck a deal to buyMicrosoft Corp.'s stake in Nook Media LLC, ending a two-year partnership and clearing the way for the bookseller to spin off its loss-making e-reader and digital content division. Barnes & Noble shares closed down 5.4 percent on the New York Stock Exchange after the company also reported a much-weaker-than-expected quarterly profit, due to lower sales of Nook devices.

Walt Disney Co. has created a new unit to make kids? educational games, starting with mobile apps such as Mickey?s Magical Math World and expanding to related toys next year. The program will include 30 apps, including five available starting Dec. 11, Burbank, CA-based Disney said today in a statement.?
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This summer, I packed up all my things and moved from San Francisco to Guangzhou, China for work. Through an unlikely chain of coincidences that I don?t entirely recall, I?ve become a product manager on WeChat, a popular messaging app in China.

On a Saturday night in August, Jing Zhou hit the dance floor of a club in Hollywood wearing the prototype of a bracelet she had designed. The white cuff, called Elemoon, had looked sleek and unassuming until Ms. Zhou charged it in the corner, and it began to flash a rainbow of colored lights.