UIE may refer to:

• United in Europe, political party in the UK
• Union of Economic Interests, political party in Portugal
• Unidentified infrared emission, in astronomy
• UNESCO Institute for Education, one of six educational institutes of UNESCO
• User interface engineering, the design of user interfaces for machines and software
• Union Internationale des Étudiants, International University Sports Federation

• Berlinale 1963
• Berlinale 1964
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• Berlinale 1987