Because many contributors wished to remain anonymous, I cannot thank them by name. I am pleased, however, to have this opportunity to acknowledge Prof. Sherry Turkle, who encouraged me and supervised the early stages of this project, and my friend Nate Osgood for his support and thoughtful comments. Additionally, I am grateful to Dr. Vicki Almstrum, Danielle Bernstein, Joost Bonsen, David Chaiken, Prof. Judy Goldsmith, Prof. Eric Grimson, Dana Henry, Magdalena Leuca, Prof. Barbara Liskov, Prof. Nancy Leveson, Dr. Fanya Montalvo, Philip Spertus, Prof. Lynn Stein, Becky Thomas, Christine Tsien, Dr. Kim Wallen, Janet Wixson, Liz Wolf, and Mary Ellen Zurko for their comments on earlier versions of this paper. I am also grateful to Dr. Anita Borg for managing an electronic mailing list of female computer scientists and to the women on the list who have helped and encouraged me. Finally, I want to express my appreciation of the many students, staff, and professors at MIT, particularly in Electrical Engineering and Computer Science, who have been wonderfully supportive of this work, especially EECS department head Prof. Paul Penfield, CS head Prof. Fernando Corbató, MIT ombudsperson Prof. Mary Rowe, and EECS administrator Marilyn Pierce. Part of this work was done while I was receiving financial support through a NSF graduate fellowship.