Uri can mean:

• Canton of Uri - a Canton of Switzerland
• a personal name - for example, Uri Geller
• Uri Party - the name of a political party in South Korea
• URI (cars) , the Namibian carmarket is with capitals, but it isn't an acronym

URI is a three letter acronym, and can be short for:

• Uniform Resource Identifier
• University of Rhode Island
• Upper Respiratory Infection
• United Religions Initiative
• Unlikely Religous Institution