Walter Waldman, 77, writer and editor active in the show business community, including stints at Variety, Paramount Pictures, United Artists and most recently Columbia Pictures, died July 4 in New York of cancer.A lifelong resident of New York, Waldman received his undergraduate degree from CCNY and a master’s degree in journalism from Columbia U. During World War II, he worked at ANETA (Dutch information agency). In the late 1940s he was a writer and editor at Variety. He segued into a career as a publicity writer and editor for Paramount Pictures and United Artists, where he worked from 1955 to 1983. He also wrote various pieces for several national publications. No immediate survivors.