| Acronym | Definition |
|---|
| TAG | Techniques d'Avant-Garde (TAG Heuer) |
| TAG | Technology Association of Georgia |
| TaG | Touch and Go (competitive go-karting) |
| TAG | Technical Advisory Group |
| TAG | Text and Graphics |
| TAG | Talented And Gifted (school program) |
| TAG | Tagalog (Filipino language) |
| TAG | Transfer Admission Guarantee (guarantee granted to students coming from community colleges into universities) |
| TAG | Technical Architecture Group (W3C) |
| TAG | Tagliabue |
| TAG | The Adjutant General |
| TAg | T-Antigen |
| TAG | Triacylglycerol |
| TAG | Teaching and Academic Growth |
| TAG | Theoretical and Applied Genetics |
| TAG | Tree Adjoining Grammar |
| TAG | Talal Abu-Ghazaleh (Jordan business law firm) |
| TAG | Technical Assistance Grant |
| TAG | Tight Aggressive (Poker) |
| TAG | Technology Advancement Group |
| TAG | Tiny Aggregation Service (ad-hoc networks) |
| TAG | Tested and Guaranteed |
| TAG | Technical Assistance Group |
| TAG | The Assassination Game |
| TAG | The Animation Guild |
| TAG | Taxon Advisory Group |
| TAG | Trans-Austria Gasleitung (Trans-Austria Pipeline) |
| TAG | The Association for the Gifted (Council for Exceptional Children) |
| TAG | Technology Assessment Group |
| TAG | Tactical Assault Group |
| TAG | Title Author Genre (literature) |
| TAG | Tampa Adventure Group (Tampa, FL) |
| TAG | Technology Assurance Group (California) |
| TAG | Training Advisory Group |
| TAG | Travel Alternatives Group |
| TAG | Trastorno de Ansiedad Generalizada (Spanish, personality disorder) |
| TAG | Turbine a Gaz (French: Gas Turbine) |
| TAG | technical assessment group (US DoD) |
| TAG | Trans-Atlantic Geotraverse |
| TAG | Tree Adjoining Grammars and Related Formalisms (linguistics workshop) |
| TAG | Task Action Grammar |
| TAG | Tactical Airlift Group |
| TAG | Tag Attribute Language |
| TAG | Transcendental Argument for the Existence of God |
| TAG | Transition Advisory Group |
| TAG | Transports de l'Agglomération Grenobloise (French: Grenoble Transportation Community; France) |
| TAG | Technology Applications Group |
| TAG | Technology Advocacy Group |
| TAG | The Amsterdam Group (Brussels, Belgium) |
| TAG | Telegraphist Air Gunner |
| TAG | Technical Applications Group |
| TAG | Transportes Aereos Guatemaltecos (Guatemala) |
| TAG | Thalassemia Action Group |
| TAG | Tailored Air Group (UK Royal Navy) |
| TAG | Troubles Anxieux Généralisés (French: Generalized Anxiety Disorder) |
| TAG | Technical Advisory Group for Biological Control Agents of Weeds |
| TAG | Tasmanian Association for the Gifted |
| TAG | Transportation Acronym Guide |
| TAG | Technology Analysis Group |
| TAG | Tagbilaran, Philippines - Tagbilaran (Airport Code) |
| TAG | TEMPEST Advisory Group |
| TAG | Timneh African Gray (bird species) |
| TAG | Two-Axis Gimbal |
| TAG | Thymine-Adenine-Guanine |
| TAG | Trailing Average Gross |
| TAG | Tallahassee Area Geocachers (Florida, USA) |
| TAG | Taxpayer Action Group |
| TAG | Target Acquisition and Guidance (gaming) |
| TAG | Test Advisory Group |
| TAG | Total Assault Gaming (gaming league) |
| TAG | Trust Advisory Group |
| TAG | Target Adaptive Guidance |
| TAG | The Amicus Group |
| TAG | Tell-And-Go protocol (switching technique) |
| TAG | Tactical Ada Guidance |
| TAG | Technical Association of Georgia |
| TAG | Test Automation Group |
| TAG | Test Aerosol Generator |
| TAG | Temporal Annotation Generator |
| TAG | Tenant Activities Group (Pentagon Renovation Project) |
| TAG | True Armageddon Galactica (Star Kingdoms alliance) |
| TAG | Towed Array Group |
| TAG | Task Assignment Guide |
| TAG | Target Aimpoint Graphic |
| TAG | Test Analysis Group |
| TAG | Telemetry-Archive Gateway |
| TAG | Tomahawk land-attack missile aimpoint graphic (US DoD) |
| TAG | TWG Administration Group |
| TAG | Troop Action Guidance |
| TAG | Trusted Agent Group |
| TAG | Transport-Aggregation-Grooming |
| TAG | Tennessee, Alabama, and Georgia Railway Company |
| TAG | Trans Arabian Group (racing) |
| TAG | Theater Air Group |
| TAG | Technical AdHoc Group |
| TAG | Tropical Architecture Group |
| TAG | The Advocacy Group (various locations) |
| TAG | The Aviation Group |
| TAG | Tidewater Atheists Group (Virginia) |
| TAG | Toh Atin Gallery (Durango, CO) |
| TAG | Tarrant Apparel Group (est. 1985) |
| TAG | Technologies for Aging Gracefully (Canada) |
| TAG | The Adventure Game (paintball) |
| TAG | Theatre Art Galleries (High Point, NC) |
| TAG | Transaction Auditing Group (various locations) |