United Press International
Unique Project Identifier
Universal Peripheral Interface
Universal Programmable Interface
Unpaid Item
upper plenum injection
User Protocol Interface
Ultrasound Physics and Instrumentation
Ultraviolet Plume Instrument
Unidentified Party Injury
Unidynamics/Phoenix, Inc.
Unified Payload Integration
Union Postale Internationale
Unione Paraguaya Industrial
unique patient identifier
United Phreaker's Incorporated
Universal Personal Identifier
Universitas Pendidikan Indonesia
University Professionals of Illinois
urinary proteinase inhibitor
Uroplasty, Inc.
Usability Problem Inspector
User Participant Information
User Payload Identifier
User Personal Identification
uteroplacental insufficiency