UoS or UOS may refer to:

Union of students, also known as students' union, a student organisation present at many universities Union of Salvation Unity Operating System or Unified Operating System, Chinese Linux Distribution United Opposition of Serbia (1990), a defunct coalition of opposition political parties in Serbia Franklin County Airport (Tennessee)

Universities

Asia

University of Sahiwal, a public university in Pakistan University of Sargodha, a public university in Pakistan University of Seoul, a public university in South Korea University of Sharjah, a university in United Arab Emirates University of Sindh, a public university in Pakistan

Europe

University of Salford, a university in Northern England University of Sheffield, a university in Northern England University of Southampton, a university in Southern England University of Suffolk, a university in Eastern England University of Surrey, a university in Southeastern England University of Sussex, a university in Southern England University of Stuttgart, a university in Southern Germany

North America University of Saskatchewan, a Canadian coeducational public research university, founded in 1907