| UPI | Ulcer Performance Index 
| Others |
| UPI | Ulead Color Picker
| Others |
| UPI | Ulead Photo Impact
| Others |
| UPI | Ultra Path Interconnect
| Others |
| UPI | Unidentified Party Injury
| Others |
| UPI | Unified Payment Interface
| Others |
| UPI | Unified Payments Interface
| Others |
| UPI | Unified Physical Infrastructure
| Others |
| UPI | Uniform Parcel Identifier
| Others |
| UPI | Union Public Interface
| Others |
| UPI | Unione delle Province Italiane
| Others |
| UPI | Unique Patient Identifier
| Others |
| UPI | Unique Product Identifier
| Others |
| UPI | Unique Project Identifier
| Others |
| UPI | Unique Public Identifier
| Others |
| UPI | United Payment Interface
| Others |
| UPI | United Peoples Inclusive
| Others |
| UPI | United Phosphorus Inc
| Others |
| UPI | United Photo Industries
| Others |
| UPI | United Photographers International
| Others |
| UPI | United Phreakers Inc.
| Others |
| UPI | United Phreakers Incorporated
| Others |
| UPI | United Piping Inc
| Others |
| UPI | United Press International
| Others |
| UPI | United Producers Inc
| Others |
| UPI | United Promotions Inc
| Others |
| UPI | United Promotions Inc.
| Others |
| UPI | Units Per Inch
| Others |
| UPI | Universal Patient Identifier
| Others |
| UPI | Universal Peripheral Interface
| Others |
| UPI | Universal Personal Identification
| Others |
| UPI | Universal Pictures International
| Others |
| UPI | Universal Product Identification
| Others |
| UPI | Universal Property Identification
| Others |
| UPI | Universitas Pendidikan Indonesia
| Others |
| UPI | University of Pathology Informatics
| Others |
| UPI | University Physicians Inc
| Others |
| UPI | University Physicians, Inc.
| Others |
| UPI | University Prize Instructorship
| Others |
| UPI | University Professionals of Illinois
| Others |
| UPI | Unlimited Potential Inc
| Others |
| UPI | Unpaid Item
| Others |
| UPI | Unreel Productions Inc
| Others |
| UPI | Unwarranted Punishment of Innovation
| Others |
| UPI | Upper Prediction Interval
| Others |
| UPI | Ural Polytechnic Institute
| Others |
| UPI | Url Programming Interface
| Others |
| UPI | Useless Piece of Information
| Others |
| UPI | User Programmable Interface
| Others |
| UPI | User Programmatic Interface
| Others |
| UPI | Utero Placental Interface
| Others |
| UPI | Uteroplacental Insufficiency
| Others |
| UPI | Util Pocket Interface
| Others |
| UPI | Utilities Power and Infrastructure
| Others |
| UPI | Utility Professionals Inc
| Others |