Oakland University

Oberlin College

Occidental College

Ohio Dominican University

Ohio Northern University

Ohio State University

Ohio University

Ohio Wesleyan University

Oklahoma, University of

Oklahoma Baptist University

Oklahoma State University — Stillwater

Oklahoma, University of Science and Arts of

Olivet College

Oregon, University of

Otterbein University

Ouachita Baptist University

An Ohio Northern University postcard published by an unknown printing company in 1907.
A c.1910 University of Oklahoma tobacco silk by Egyptienne Luxury Cigarettes.
A c.1910 Occidental College tobacco silk by Egyptienne Luxury Cigarettes.
A c.1910 Ohio State University tobacco silk by Egyptienne Luxury Cigarettes.
A c.1910 Ohio Wesleyan University tobacco silk by Egyptienne Luxury Cigarettes.
A c.1909-1911 tobacco card for Ohio University by Murad Cigarettes, exhibiting a lighter shade of the university's olive green than was typical at the time.
A c.1937 cardboard trading disc for the University of Oklahoma by Seal-Craft.