I immediately thought of the anecdote about World War II British SIGINT operators being able to identify individual German telegraphers by way of their distinct

I immediately thought of the anecdote about World War II British SIGINT operators being able to identify individual German telegraphers by way of their distinctive style of Morse keying. http://listserv.linguistlist.org/pipermail/ads-l/2005-April/048637.html http://listserv.linguistlist.org/pipermail/ads-l/2005-April/... https://web.archive.org/web/20100820000534/https://www.wnyc.org/books/42607 https://web.archive.org/web/20100820000534/https://www.wnyc.... (Search for 'fist')