Look up USD in Wiktionary, the free dictionary.

USD stands for:

• United States dollar, the official currency of the United States
• University of San Diego, San Diego, California, USA
• University of South Dakota, Vermillion, South Dakota, USA
• Under Secretary of Defense, the third-highest ranking position in the U.S. Department of Defense.
• Unified school district, an Identification Number for most public schools in America (e.g., Wichita, Kansas's school district number is 259).
• Universal Skate Design, an aggressive in-line skating company

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