Steve Schear has provided a 1988 follow-up article on Van Eck's 1985 study of EMR snooping. It includes a letter by Van Eck explaining why he omitted certain information in the original article, and why his employer "classified" more sophisticated studies of "compromising emanation." We've put up HTML and PDF versions: http://jya.com/bits.htm (12 kb plus 2 images) http://jya.com/bits.pdf (85 kb)