T.O. Sylvester is the pen-name for the cartooning team of artist Sylvia Mollick (born 1946, New York City) and writer Terry Ryan (July 14, 1946 - May 16, 2007). They started working together in 1977 and had a weekly cartoon feature in the San Francisco Sunday Chronicle review section for 16 years. Their single panel cartoons also appeared in publications like The Advocate, Gay Comix, and The Saturday Evening Post. In 1993, their comics were the subject of an exhibition at the Cartoon Art Museum in San Francisco, California titled "Scrambled Genius: T.O. Sylvester and Paul Mavrides".
Ryan later reached a mainstream audience with her memoir The Prize-Winner of Defiance, Ohio which was later adapted into a movie starring Julianne Moore as Ryan's mother.
- Warren, Roz (ed.) "T.O. Sylvester", Dyke Strippers (Cleis Press, 1992) p. 189.