This paper examines the cultural climate faced by women in the American computer industry from the 1960s to the early 1980s, a period in which the percentage of the industry workforce that was female almost tripled. Drawing on a comprehensive study of articles and advertisements in the trade journal Datamation, sources from IBM, Control Data, and the Burroughs Corporation, and the records of the user group SHARE, Inc, the study argues that the cultural climate of the industry shifted radically in the early 1970s, from hostility in the 1960s to a more open one in the late 1970s and early 1980s.