VO can refer to:
Volleyball is a team sport in which two teams of six players are separated by a net. Each team tries to score points by grounding a ball on the other team's court under organized rules.
Vodafone Group plc is a British multinational telecommunications company, with headquarters in London.
François-Marie Arouet (French: [fʁɑ̃.swa ma.ʁi aʁ.wɛ]; 21 November 1694 – 30 May 1778), known by his nom de plume Voltaire (; French: [vɔl.tɛːʁ]), was a French Enlightenment writer, historian, and philosopher famous for his wit, his attacks on the established Catholic Church, and his advocacy of freedom of religion, freedom of speech, and separation of church and state.
Volkswagen (German pronunciation: [ˈfɔlksˌvaːɡŋ̍] - listen ), shortened to VW, is a German automaker founded on May 28, 1937 by the German Labour Front and headquartered in Wolfsburg.
Voice over Internet Protocol (also voice over IP, VoIP or IP telephony) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet.
The Vought F4U Corsair is an American fighter aircraft that saw service primarily in World War II and the Korean War.