Stephen (Steve) J. Lukasik (1931 – 2019) was an American physicist who served in multiple high-level defense and scientific related positions for advancing the technologies and techniques for national defense and the detection and control of diverse types of weapons of mass destruction, especially nuclear devices. He was the second longest serving Director of DARPA—the Defense Advanced Research Projects Agency—during which numerous new technologies including packet and internet protocols were developed. He was also the first Chief Scientist of the Federal Communications Commission where he created its Office of Science and Technology and which facilitated the commercial deployment of new technology that included spread spectrum technology.
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