O (disambiguation) Ö Ơ Õ Ø P&O Ó O O-methylated flavonoid O' O visa Ò O Antiphons O-GlcNAc O A e o Z Douglas O-38 Open O Pui O O class O line O lucenti, o sereni occhi O series Tai O O Come, O Come, Emmanuel Ping-O-Tronic Big O O. Henry Award Oʻ Big O notation Haplogroup O-M119 O-ring O Tannenbaum Yeshe-Ö Ɵ Ó Paí, Ó O Tempo e o Vento O le Ao o le Malo P&O Princess Cruises P&O Cruises O (Cyrillic)