Florence Marion Newman Trefethen (1921–2012) was an American codebreaker, historian of operations research, poet, and English professor.
[2] She enlisted as a Naval officer during World War II, and served in the WAVES as a codebreaker.
[1][3] During this service she met Merchant Marine and later mechanical engineer Lloyd M. Trefethen;[3] they married in 1944.
[1] With Joseph F. McCloskey, Trefethen edited the book Operations Research for Management (Johns Hopkins University Press, 1954).
[6] She wrote the first chapter of the book, an early history of the field of operations research.