Daniel Rosensweig, Hobart Class of 1983, was recently named chief operating officer of Yahoo! Inc. Reporting to chairman and chief executive officer, Terry Semel, Rosensweig will oversee the operations of Yahoo! worldwide. Functions reporting to him include product development, marketing, international operations, and North American operations, which encompasses the Company's six business units and advertising sales. Rosensweig will be based in Sunnyvale, Calif., and will assume his duties May 13.