What is "ust"

UST or Ust may refer to:

• Equatorial Guinea Workers' Union
• Northeast Florida Regional Airport in St. Augustine, Florida (IATA Airport Code UST)
• Underground storage tank
• Uniform spanning tree, a mathematical concept
• United States Television Manufacturing Corp.
• Union of Trade Unions of Chad (Union des Syndicats du Tchad)
• Universal Standard Time
• Universal Standard for Tubeless, a tubeless bicycle tire system developed by Mavic
• UST Growling Tigers, men's varsity team
• U.S. Smokeless Tobacco Company, a subsidiary of UST Inc.
• .ust, file extension for plain-text Utau voice sequence files