O36 is an Australian genzine published by Marc Ortlieb.
Q36 received the Ditmar Award for Best Fanzine in 1981, 1982 and 1983. Featured exploding planets on the cover - as homage to the Eludium Q36 Explosive Space Modulator, from the Warner Brothers Martian Cartoons.
Q36 regularly featured artwork by John Packer.
Marc Ortlieb had previously published the fanzines Mad Dan's Review. He also published 26 issues of Tigger between 1984 and 1987, and later he did the apazine Stairway to Cleveland, and then The Australian Science Fiction Bullsheet from 1995 to the 2002.