| Acronym | Definition |
|---|
| CUI | Concordia University (Irvine, CA) |
| CUI | Contrat Unique d'Insertion (French: Single Integration Contract) |
| CUI | Corrosion Under Insulation (American Petroleum Institute standards) |
| CUI | Controlled Unclassified Information |
| CUI | Console User Interface |
| CUI | Character User Interface |
| CUI | Concept Unique Identifier |
| CUI | Common User Interface |
| CUI | Christians United for Israel |
| CUI | Concrete User Interface |
| CUI | Cubic Inches |
| CUI | Color User Interface |
| CUI | Custom User Interface |
| CUI | Content and User Interface |
| CUI | Canadian Urban Institute |
| CUI | Centre Universitaire d'Informatique (Geneva, Switzerland) |
| CUI | Cycling under the Influence (California) |
| CUI | Consistent User Interface |
| CUI | Chargeable User Identity |
| CUI | Customer User Interface |
| CUI | Consolidated Unit Inspection (various armed forces) |
| CUI | Centro Universitario de Idiomas (Argentina) |
| CUI | Código Único de Identificación (Spanish: Unique Identification Code; various nations) |
| CUI | Communications User Interface |
| CUI | Critical Unclassified Information |
| CUI | Combined Unit Inspection (US Air Force) |
| CUI | Cellular Usage Index (Republic Wireless) |
| CUI | Chemical Use Inventory |
| CUI | CMP User Interface |