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Wendy M. Grossman, a frequent contributor on information technology, is based in London.

More by Wendy M. Grossman
大眾科學 Magazine Vol 279 Issue 2This article was originally published with the title “Access Denied” in 大眾科學 Magazine Vol. 279 No. 2 (), p. 38
doi:10.1038/scientificamerican0898-38
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