Bob Evans

Computer Scientist

Bob Evans, 77, a computer scientist who helped popularize personal computing and served as a scientific adviser to the Taiwanese government, died of a heart ailment Sept. 2 at his home in Hillsborough, Calif., near San Francisco.

Mr. Evans joined IBM in 1951 and worked there for 33 years. In the early 1960s, he led the team that designed the IBM System 360, one of the first computers sold commercially. President Ronald Reagan awarded Mr. Evans the National Medal of Technology for his work.

Mr. Evans later served as IBM's chief engineer and led the development of a variety of personal computing and communications satellite products. From 1981 to 1995, he was a chief science adviser to the government of Taiwan and helped develop strategy for the island's semiconductor industry.

Robert Cumming

Columbia Philosophy Professor

Robert Cumming, 87, a professor emeritus of philosophy at Columbia University who wrote several books about phenomenology, died Aug. 25 at his home in Manhattan. No cause of death was reported.

Dr. Cumming wrote several books, including a four-volume work on phenomenology, the study of how perceptions of events shape a person's reality. The volumes, published from 1991 to 2002, were titled "Phenomenology and Deconstruction: The Dream Is Over," "Method and Imagination," "Breakdown in Communication" and "Solitude."

Benjamin Horowitz

Art Dealer

Benjamin Horowitz, 92, an influential art dealer who represented a number of social-realist painters and headed California's dealer association, died Sept. 3 in Los Angeles. No cause of death was reported.

Mr. Horowitz, a native of New York, worked as a writer until social-realist artists William Gropper, Ben Shahn and Moses and Raphael Soyer asked him to move to California and represent their art. He also was among the first to promote works by such black artists as Charles White and Latin American artists David Alfaro Siqueiros and Jose Clemente Orozco.

Nearly 30 years ago, Mr. Horowitz helped establish the nonprofit Art Dealers Association of California. He served as the group's president for 10 years and as a board member while working to create and enforce a code of ethics for dealers.