| UAA | User Account and Authentication 
| Others |
| UAA | User Account Authentication
| Others |
| UAA | User Authorization Answer
| Others |
| UAA | Uskudar American Academy
| Others |
| UAA | Utah Apartment Association
| Others |
| UAA | Utilised Agricultural Area
| Others |
| UAA | Utility Arborist Association
| Others |
| UAA | Uyghur American Association
| Others |
| UAAA | Almaty (Alma Ata), Kazakhstan
| Others |
| UAAA | University of Alaska Anchorage Alumni
| Others |
| UAAAA | Universal Association Against Acronym Abuse
| Others |
| UAAAA | University of Alaska Anchorage Alumni Association
| Others |
| UAAB | Unassigned at Birth
| Others |
| UAAE | Utah Association of Agricultural Education
| Others |
| UAAE | Utah Association of Agricultural Educators
| Others |
| UAAE | Utah Association of Agriculture Educators
| Others |
| UAAF | Uluslararasi Amator Atletizm Federasyonu
| Others |
| UAAG | User Agent Accessibility Guidelines
| Others |
| UAAGI | United Asia Automotive Group Inc.
| Others |
| UAAH | Balhash, Kazakhstan
| Others |
| UAAI | United African Auto Industries
| Others |
| UAAI | United Australian Automobile Industries
| Others |
| UAAI | Universal Advertising Associates Inc
| Others |
| UAAI | Unmanned Aircraft Association of Ireland
| Others |
| UAAIA | United African Americans In Alabama
| Others |
| UAAM | Urban Ayushman Arogya Mandir
| Facility, Health, Medical, Hospital |
| UAAN | Unidad de Aislamiento de Alto Nivel
| Others |
| UAAN | Uzunagach, Kazakhstan
| Others |
| UAAP | Office of Undergraduate Advising and Academic Programming (MIT)
| Others |
| UAAP | Undergraduate Advising and Academic Programming
| Others |
| UAAP | University Athletic Association of the Philippines
| Others |
| UAAS | Ukrainian Academy of Agrarian Sciences
| Others |
| UAAS | Ukrainian Academy of Agricultural Sciences
| Others |
| UAAS | Underwater Acoustic Analysis System
| Others |
| UAAS | Unification of Athens Archaeological Sites
| Others |
| UAAS | Union of Armenian Associations of Sweden
| Others |
| UAAS | United Association of Alternative Science
| Others |
| UAAS | University Advising and Academic Services
| Others |
| UAAS | University Auditing and Advisory Services
| Others |
| UAAS | University of Applied Arts and Sciences
| Others |
| UAAS | Unsafe At Any Speed
| Others |
| UAAS | Upper Air Atmospheric Sounding
| Others |
| UAB | Incirlik Air Base Airport, Adana, Turkey
| Others |
| UAB | U Are Busy
| Others |
| UAB | Uab Meto
| Others |
| UAB | Un-accompanied Air Baggage
| Others |
| UAB | Unaccompanied Air Baggage
| Others |
| UAB | Unarmed Attack Bonus
| Others |
| UAB | Undergraduate Academic Board
| Others |
| UAB | Underwater Archaeology Branch
| Others |