8O

8O or 8-O


 * 8O, IATA code for West Coast Air
 * 8º (also 8o), an abbreviation in bookbinding for Octavo
 * 8º, an abbreviation for eighth in some languages
 * 8º TAP Rallye de Portugal; see 1974 Rallye de Portugal
 * Oxygen (8O), a chemical element