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 conglomerate with headquarters in London and Newbury, Berkshire.
François-Marie Arouet (French: [fʁɑ̃swa maʁi aʁwɛ]; 21 November 1694 – 30 May 1778), known by his nom de plume Voltaire (; also US: , French: [vɔltɛːʁ]), was a French Enlightenment writer, historian, and philosopher famous for his wit, his criticism of Christianity, especially the Roman Catholic Church, as well as his advocacy of freedom of speech, freedom of religion, and separation of church and state.
Voice over Internet Protocol (VoIP), also called IP telephony, is a method and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet.
In 1492, a Spanish-based transatlantic maritime expedition led by Italian explorer Christopher Columbus encountered the Americas, continents which were completely unknown in Europe, Asia and Africa and were outside the Old World political and economic system.