I am an engineer. My degrees are in electrical engineering and my work has been in the digital systems area, mainly digital logic, but also computer organization, software and theory. I am a Professor, Emeritus, Computer Science and Electrical Engineering at Columbia University (retired 6/08 after four decades at Columbia). Before joining the Columbia faculty, I worked at Bell Labs for about five years, and while at Columbia I worked in industry (e.g., at IBM, and RCA Laboratories) often during summers and sabbaticals, as well as doing some consulting work. I have always been interested in the social implications of technology and have done a lot of work in this area, giving talks, writing articles and doing some organizing. Topics I have been actively involved in include engineering ethics, resisting government imposed secrecy in technology, environmental issues. I wrote, "Controlling Technology: Ethics and the Responsible Engineer", 2nd Ed., 1994, Wiley. (Also authored two books on digital logic).