BU, Bu and variations may refer to:
Buddhism (, US also ) is the world's fourth-largest religion with over 520 million followers, or over 7% of the global population, known as Buddhists.
Bulgaria ( (listen); Bulgarian: България, tr. Bǎlgariya), officially the Republic of Bulgaria (Bulgarian: Република България, tr.
Buenos Aires ( or ; Spanish pronunciation: [ˈbwenos ˈaiɾes]) is the capital and largest city of Argentina.
Budapest is the capital and the most populous city of Hungary, and the tenth-largest city in the European Union by population within city limits.
Bupropion, sold under the brand names Wellbutrin and Zyban among others, is a medication primarily used as an antidepressant and smoking cessation aid.
Burton Leon Reynolds Jr. (February 11, 1936 – September 6, 2018) was an American actor, director and producer.
Buffalo is the second largest city in the U.S. state of New York. As of July 2016, the population was 256,902. The city is the county seat of Erie County, and a major gateway for commerce and travel across the Canada–United States border, forming part of the bi-national Buffalo Niagara Region.
Buzz Aldrin (; born Edwin Eugene Aldrin Jr.; January 20, 1930) is an American engineer, former astronaut, and fighter pilot.