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A "union" generally refers to a group formed for mutual benefit or collective action. The **Union Pacific Railroad** is a major U.S. freight rail network. The **United Auto Workers** is a labor union representing automotive workers. The **European Union** is a political and economic partnership among European nations. **Union Carbide** is a chemical company known for industrial products. **Union Theological Seminary** is a prominent school for theological studies. The **Union for Reform Judaism** advocates for progressive Judaism. **Union Square** in New York is a public space. A **Teachers' Union** represents educators' interests. **Union Bank** is a financial institution. The **Union Jack** is the national flag of the UK. The **Union of Concerned Scientists** advocates for scientific solutions to global issues. The **United Nations** is an international organization promoting peace. The **USSR** was a former communist state. **Union Stations** are historic train stations. **Union County** refers to various counties in different U.S. states.