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DefCon IV was held May 18, 1991 at the UCSD Price Center in San Diego, CA. The GoHs were Jefferson P. Swycaffer and Dr. Stephen Potts.
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|This is a convention page. Please extend it by adding information about the convention, including dates, GoHs, convention chairman, locale, sponsoring organization, external links to convention pages, awards given, the program, notable events, anecdotes, pictures, scans of publications, pictures of T-shirts, con reports, etc.|