- U.S. Dept. of Commerce
- U.S. Inflation-Adjusted Securities
- U.S. International Trade Commission
- U.S. Treasury Bills
- U.S. Treasury Notes
- U.S.-Canada Free Trade Agreement of 1989
- Underground Economy
- Underwriting (Insurance)
- Underwriting (Securities)
- Uniform Commercial Code
- Unit Investment Trust
- United Nations (UN)
- Utilitarianism
