O14 is a set of model railway standards. O14 may also refer to: * O-14 (Dubai), an office skyscraper located in Business Bay in Dubai, United Arab Emirates * USS O-14 (SS-75), an O-class submarine of the United States Navy * Douglas O-14, an aircraft * HNLMS O 14, a Royal Netherlands Navy O 12-class submarine * Oxygen-14 (O-14 or 14O), an isotope of oxygen This disambiguation page lists articles associated with the same title formed as a letter-number combination. If an internal link led you here, you may wish to change the link to point directly to the intended article.