Union Oil Company of California, dba Unocal /ˈjuːnɵkæl/ is a defunct company that was a major petroleum explorer and marketer in the late 19th century, through the 20th century, and into the early 21st century. It was headquartered in El Segundo, California, United States.

On August 10, 2005, Unocal merged with Chevron Corporation and became a wholly owned subsidiary. Unocal has now ceased operations as an independent company, but continues to conduct many operations as Union Oil Company of California, a Chevron company.

The Union Oil Company of California was founded on October 17, 1890, in Santa Paula, California, by Lyman Stewart, Thomas Bard, and Wallace Hardison. It was a merger of three Southern California Oil Companies: the Sespe Oil Company, the Hardison and Stewart Oil Company, and the Mission Transfer Company. All three were notable as being completely unaffiliated with Standard Oil. Union Oil moved its headquarters to Los Angeles, in 1901. The original headquarters in Santa Paula is a California Historical Landmark.

George Gershwin (September 26, 1898 – July 11, 1937) was an American composer and pianist. Gershwin's compositions spanned both popular and classical genres, and his most popular melodies are widely known. Among his best known works are the orchestral compositions Rhapsody in Blue and An American in Paris, as well as the opera Porgy and Bess.

Born in Brooklyn to a Ukrainian father of Jewish descent and a Russian mother, Gershwin studied piano under Charles Hambitzer and composition with Rubin Goldmark and Henry Cowell. He began his career as a song plugger, but soon thereafter started composing Broadway theatre works with his brother Ira Gershwin and Buddy DeSylva. He moved to Paris in an attempt to study with Nadia Boulanger, where he began to compose An American in Paris. After returning to New York City, he wrote Porgy and Bess with Ira and author DuBose Heyward. Initially a commercial failure, Porgy and Bess is now considered one of the most important American operas of the Twentieth Century. Gershwin moved to Hollywood and composed numerous film scores until his death in 1937 from a brain tumor.