R A RatcliffR. A. Ratcliff, who currently lives and consults in the hills above Silicon Valley, has taught history and rhetoric at the University of California at Berkeley and the University of San Francisco and has lectured at the National Security Agency's intlligence school. In addition to working in the high tech industry, Dr Ratcliff has written articles for Cryptologia, Intelligence and National Security, and the NSA's internal newsletter. Read More Read Less