| U&C | Usual & Customary 
| Others |
| U&C | Usual and Customary
| Others |
| U.C. | Unidad Central
| Others |
| U/C | Under Current
| Others |
| U/C | Unit Cost
| Others |
| U/C | Upconverter
| Others |
| uC | MicroController
| Others |
| UC | Ubehebe Crater
| Others |
| UC | Ubiquitous Connectivity
| Others |
| UC | UCWeb Inc
| Others |
| UC | Ulcerative Colitis
| Others |
| UC | Ultimate Charizard
| Others |
| UC | Ultra Cameo
| Others |
| UC | Ultra Coarse
| Others |
| UC | Ultra Color
| Others |
| UC | Ultra Combo
| Others |
| UC | Ultra Compact
| Others |
| UC | Ultra-Coated
| Others |
| UC | Un-Changed
| Others |
| UC | Un-Clutch
| Others |
| UC | Un-Conscious
| Others |
| UC | Unacceptable Content
| Others |
| UC | Unanimous Consent
| Others |
| UC | Unary Counting
| Others |
| UC | Unassisted Childbirth
| Others |
| UC | Uncirculated Coins
| Others |
| UC | Unconfined Compression Test
| Others |
| UC | Uncontrolled Charging
| Others |
| UC | Unconventional Computing
| Others |
| UC | Uncoupled Chains
| Others |
| UC | Under Construction
| Others |
| UC | Under Control
| Others |
| UC | Under Cost
| Others |
| UC | Under Counter
| Others |
| UC | Undercover
| Others |
| UC | Undergraduate Council
| Others |
| UC | Underpinning Contracts
| Others |
| UC | Understanding Communications
| Others |
| UC | Undesirable Customer
| Others |
| UC | Undirected Cut
| Others |
| UC | Undiscovered Concept
| Others |
| UC | Unemployment Compensation
| Others |
| UC | Unesterified Cholesterol
| Others |
| UC | Ungodly Compensation
| Others |
| UC | Unified Coarse
| Others |
| UC | Unified Communication
| Others |
| UC | Unified Communications
| Others |
| UC | Unified Conglomerate
| Others |
| UC | Uniformity Coefficient
| Others |
| UC | Unincorporated Company
| Others |
| UC | Union Club
| Others |
| UC | Union College
| Others |
| UC | Union Council
| Others |
| UC | Unique Configuration
| Others |
| UC | Unit Cell
| Others |
| UC | Unit Cells
| Others |
| UC | Unitary Council
| Others |
| UC | United Center
| Others |
| UC | United Citizens
| Others |
| UC | Universal Camera
| Others |
| UC | Universal Century
| Others |
| UC | Universal Colony
| Others |
| UC | Universal Combat
| Others |
| UC | Universal Combo
| Others |
| UC | Universal Control
| Others |
| UC | Universal Creative
| Others |
| UC | Universidad de Carabobo
| Others |
| UC | University Cafe
| Others |
| UC | University Campus
| Others |
| UC | University Center
| Others |
| UC | University Challange
| Others |
| UC | University College
| Others |
| UC | University Contribution
| Others |
| UC | University of California
| Others |
| UC | University of Chicago
| Others |
| UC | University of Cincinnati
| Others |
| UC | Unix Consultant
| Others |
| UC | Unnecessary Cowardice
| Others |
| UC | Unreal Championship
| Others |
| UC | Unreal Compile
| Others |
| UC | Unsatisfactory Condition
| Others |
| UC | Unstoppable Colossus
| Others |
| UC | Until Changed
| Others |
| UC | Up Chord
| Others |
| UC | Upon Completion
| Others |
| UC | Upper Canada
| Others |
| UC | Upper Case
| Others |
| UC | Upper Circle
| Others |
| UC | Uppercase Capital
| Others |
| UC | Upstage Centre
| Others |
| UC | Urban Catalyst
| Others |
| UC | Urban Commuter
| Others |
| UC | Urgent Care
| Others |
| UC | Use Case
| Others |
| UC | User Conference
| Others |
| UC | User Consultant
| Others |
| UC | User Context
| Others |
| UC | User Costs
| Others |
| UC | Usual Conditions
| Others |
| UC | Uterine Contractions
| Others |
| UC | Utility Clerk
| Others |