USI or Usi may stand for: Organizations USI Tech, a suspected ponzi scheme USI Wireless, a Minnesota internet service provider Union of Independent Trade Unions (Portugal) Union of Students in Ireland, the representative body for students' unions in Ireland Unione Sindacale Italiana, an Italian trade union Union Solidarity International (USi), an international labour organising support organisation Unlimited Software Inc., see Distinctive Software
Places Usı, Tatarstan, a place in Russia Usi County, a county in westernmost Chagang province, North Korea United States of Indonesia, a state in Southeast Asia from 1949 to 1950 University of Southern Indiana, a University located near Evansville, Indiana, United States University of Siegen, a University located in Siegen, North Rhine-Westphalia, Germany Università della Svizzera italiana, the University of Italian-speaking Switzerland
Other uses Usi (food), a starch dish of the Urhobo people of Nigeria Uši, an album by Czech band Uz jsme doma User System Interaction, a postgraduate engineering design program in the Netherlands Unique Student Identifier, a unique identifier for all higher education students in Australia Unique Swap Identifier, see Unique Transaction Identifier, identifier for trades mandated by financial markets regulation Universal Stylus Initiative for interoperable active pen styluses for touchscreen devices USI: Under Special Investigation, 2010 TV series