Richard S. Rosenbloom, the David Sarnoff Professor of Business Administration Emeritus at Harvard Business School (HBS) and an authority on the management of technology and innovation, whose teaching and pioneering research had a significant impact at HBS and beyond for more than five decades, died on Oct. 24 in New York City. He was 78 and had been in declining health for the past two years.A member of the HBS faculty since 1957, Rosenbloom focused on exploring the strategic uses of technology by corporations and the relationship between technological change and competitive strategy. He published numerous books, articles, and papers on technology-related topics. Rosenbloom retired from the active HBS faculty in 1998, but continued to write and conduct research for many years as well as serve on the board of Arrow Electronics.Rosenbloom is survived by three children, Joshua of Lawrence, Kan., Danny of Brooklyn, N.Y., and Rachel of Cambridge, Mass.; and eight grandchildren. Services have been held. In lieu of flowers, donations in memory of Rosenbloom can be made to the Harvard College Fund Scholarship Program (Attn: Anne Funderburk), Harvard University, 124 Mt. Auburn St., Cambridge, MA 02138. A memorial service is being planned for a later date.Read the full obituary.