WI or wi may refer to:
Wikipedia ( (listen), (listen) WIK-ih-PEE-dee-ə) is a multilingual online encyclopedia with exclusively free content and no ads, based on open collaboration through a model of content edit by web-based applications like web browsers, called wiki.
Wikidata is a collaboratively edited knowledge base hosted by the Wikimedia Foundation. It is a common source of open data that Wikimedia projects such as Wikipedia can use, and anyone else, under a public domain license.
William Shakespeare (bapt. 26 April 1564 – 23 April 1616) was an English poet, playwright and actor, widely regarded as the greatest writer in the English language and the world's greatest dramatist.
Sir Winston Leonard Spencer-Churchill, (30 November 1874 – 24 January 1965) was a British politician, army officer, and writer.
Wisconsin ( (listen)) is a U.S. state located in the north-central United States, in the Midwest and Great Lakes regions.
William III (Dutch: Willem; 4 November 1650 – 8 March 1702), also widely known as William of Orange, was sovereign Prince of Orange from birth, Stadtholder of Holland, Zeeland, Utrecht, Gelderland and Overijssel in the Dutch Republic from 1672 and King of England, Ireland and Scotland from 1689 until his death in 1702. As King of Scotland, he is known as William II.
Wilhelm II (German: Friedrich Wilhelm Viktor Albert; 27 January 1859 – 4 June 1941) was the last German Emperor (Kaiser) and King of Prussia, reigning from 15 June 1888 until his abdication on 9 November 1918 shortly before Germany's defeat in World War I.