| TRO | Tactical Reconnaissance Office 
| Others |
| TRO | Tail recursion optimization
| Others |
| TRO | Tailings Reduction Operation
| Others |
| TRO | Tailings Reduction Operations
| Others |
| TRO | tal Relaxed Organization
| Others |
| TRO | Tamil Rehabilitation Organization
| Others |
| TRO | Tamils Rehabilitation Organisation
| Others |
| TRO | Tamils Rehabilitation Organization
| Others |
| TRO | Taree, New South Wales, Australia
| Others |
| TRO | Tasmanian Revenue Online
| Others |
| TRO | Tax Relief Office
| Others |
| TRO | Team Rhino Outdoors
| Others |
| TRO | Technology Refresh Option
| Others |
| TRO | Teens Reaching Out
| Others |
| TRO | Temporary Restraining Order
| Others |
| TRO | Temporary Restraining Orders
| Others |
| TRO | Terrano
| Others |
| TRO | Textbook Reservation Option
| Others |
| TRO | The Respected Outlawz
| Others |
| TRO | The Richmond Organization
| Others |
| TRO | The Rights Organization
| Others |
| TRO | The Ritchie Organization
| Others |
| TRO | Therapeutic Recreation Ontario
| Others |
| TRO | Thyroid-Related Orbitopathy
| Others |
| TRO | Time Ran Out
| Others |
| TRO | Time Ran Outor
| Others |
| TRO | To return to office
| Others |
| TRO | To Rule Out ....
| Others |
| TRO | Tool Room Operations
| Others |
| TRO | Top Rank Objective
| Others |
| TRO | Total Residual Oxidizer
| Others |
| TRO | Totally Rare And Outlandish
| Others |
| TRO | Towing and Recovery Operators
| Others |
| TRO | Traffic Regulation Order
| Others |
| TRO | Traffic Regulation Orders
| Others |
| TRO | Training and Readiness Oversight
| Others |
| TRO | Translational Research Office
| Others |
| TRO | Transtrochanteric Rotational Osteotomy
| Others |
| TRO | Travel Reduction Ordinance
| Others |
| TRO | Travel Request Online
| Others |
| TRO | Trip Reduction Ordinance
| Others |
| TRO | Truck Race Organisation
| Others |
| TRO | Trusted Root Object
| Others |
| TRO | Tulsa Repeater Organization
| Others |
| TRO | Type R Owners
| Others |
| TRO | Tyrrell Racing Organisation
| Others |