| Acronym | Definition |
|---|
| TAC | Tactic/Tactics/Tactical |
| TAC | Technical Assistance Center |
| TAC | Texas Administrative Code |
| TAC | Transport Accident Commission (Australian government car accident insurance) |
| TAC | Terms and Conditions |
| TAC | Treatment Action Campaign (South Africa) |
| TAC | Total Allowable Catch |
| TAC | Tactical Air Command (USAF; now Air Combat Command) |
| TAC | Traditional Anglican Communion |
| TAC | Tacrolimus |
| TAC | Technology Accreditation Commission (ABET) |
| TAC | Transportation Association of Canada |
| TAC | The American Cause (conservative think tank) |
| TAC | Tactical Communications |
| TAC | Technical Advisory Council (Ascend, Cisco, Ericsson, Lucent, Nortel, Selsius, etc) |
| TAC | Terminal Access Controller |
| TAC | Tokyo American Club |
| Tac | Thermoplasma Acidophilum |
| TAC | Toxic Air Contaminant |
| TAC | Triamcinolone Acetonide |
| TAC | Toxic Air Contaminants |
| TAC | Transaction Code |
| TAC | Technical Assistance Collaborative |
| TAC | Treaty of Amity and Cooperation |
| TAC | Tomografia Assiale Computerizzata (Italy) |
| TAC | Taxpayer Assistance Center (IRS) |
| TAC | Total Area Coverage (printing; ink/color management) |
| TAC | Type Approval Code (IMEI number) |
| TAC | Tactical Command Post |
| TAC | Training Accreditation Council (Western Australia) |
| TAC | Tour Andover Controls |
| TAC | Triangle Aquatic Center (Cary, NC) |
| TAC | Technical Assistance Contract |
| TAC | Targeted Amortization Class (bonds) |
| TAC | Traffic Advisory Committee |
| TAC | Transportation Account Code |
| TAC | Transatlantic Programs Center (USACE) |
| TAC | Traffic Acquisition Cost (websites, advertising) |
| TAC | Traffic Acquisition Cost |
| TAC | Toronto Arts Council |
| TAC | The Athletics Congress (now USATF) |
| TAC | Tactical Air Controller |
| TAC | Training Advisory Committee |
| TAC | Telecommunications Advisory Committee |
| TAC | The Aleut Corporation |
| TAC | Terminal Agency Coordinator |
| TAC | The Acacia Strain (band) |
| TAC | Time to Amplitude Converter |
| TAC | Tomografia Axial Computorizada |
| TAC | Technical Activities Committee |
| TAC | Theoretical Astrophysics Center (Copenhagen, Denmark) |
| TAC | Terminal Area Chart |
| TAC | Triacetyl Cellulose (polarizing film/filters manufacturing) |
| TAC | Tourism Advisory Committee |
| TAC | Third Amended Complaint (legal) |
| TAC | Threat Assessment Chart |
| TAC | Technical Assistance Coordinator |
| TAC | Telescope Allocation Committee |
| TAC | Transaction Authorization Code (bank cards) |
| TAC | Tactical Advanced Computer |
| TAC | Total Access Communication System |
| TAC | Trauma Association of Canada |
| TAC | Transatlantic Council (Boy Scouts of America Council for Europe, North Africa and the Near East) |
| TAC | The Acting Company (New York, NY) |
| TAC | Transportation Account Codes |
| TAC | Type Allocation Code (telecommunications) |
| TAC | Terminal Access Control |
| TAC | Transnational Auditors Committee |
| TAC | Tactical Manual |
| TAC | Telemetry and Command (processor) |
| TAC | Tactical Air Commander |
| TAC | Throttle Actuator Control (General Motors) |
| TAC | Three Address Code |
| TAC | Tactical Air Coordinator |
| TAC | Totally Awesome Computers (retailer; Salt Lake City, UT, USA) |
| TAC | Tacloban, Philippines - Dz Romualdez (Airport Code) |
| TAC | Tidewater Aquatic Club (Virginia) |
| TAC | Telecommuting Advisory Council |
| TAC | Trigeminal Autonomic Cephalgia (headache) |
| TAC | The Architect's Collaborative |
| TAC | Technology Assessment Center |
| TAC | Theoretical and Applied Climatology |
| TAC | Trademark Assistance Center |
| TAC | TELUS Advanced Communications (Canadian business) |
| TAC | Tetracaine, Adrenaline, and Cocaine (medical) |
| TAC | Tarsus American College |
| TAC | Tuticorin Alkali Chemicals |
| TAC | Total Aerobic Count |
| TAC | Toronto Autosport Club (Toronto, Ontario, Canada; est. 1955) |
| TAC | Translator-Assembler-Compiler |
| TAC | Technical Acceptance Certificate (Canada) |
| TAC | Tenant Associations Coalition (San Francisco, CA) |
| TAC | Toulouse Athlétic Club (French fitness club) |
| TAC | Texas Antiquities Code |
| TAC | Technical Assurance Co-Ordinator (UK project management role) |
| TAC | Thrust Asymmetry Compensation (Boeing) |
| TAC | Team Aerial Combat (gaming) |
| TAC | Type of Address Code |
| TAC | Tactical Airsoft Club (Dumaguete City, Philippines) |
| TAC | Total Accumulated Cycles |
| TAC | Turkic Accelerator Complex |
| TAC | Teen Activity Center |
| TAC | Trail Advisory Committee (Alberta, Canada) |
| TAC | Tour Athletic Club (France) |
| TAC | Transportation Allowance Committee |
| TAC | Target/Tactical Acquisition Console |
| TAC | Time At Completion |
| TAC | Tribunal de l'Aviation Civile du Canada (Civil Aviation Tribunal) |
| TAC | The Application Connection |
| TAC | Terminal Action Code(s) |
| TAC | Tauranga Aero Club (New Zealand) |
| TAC | Terlaemen Auto Club (Belgium) |
| TAC | Taxotere, Adriamycin and Cyclophosphamide (chemotherapy regime) |
| TAC | Type of Activity Code |
| TAC | Thunderbird Activity Center (AGSIM, Glendale, AZ) |
| TAC | Transitional Advisory Council |
| TAC | Technical Advisory Center (Sprint) |
| TAC | Terminal-Aggregator Communication |
| TAC | TRADOC Acquisition Center |
| TAC | Transparent Auto-Compilation |
| TAC | Thornapple Arts Council |
| TAC | Touquet Automobiles de Collection (French automobile collection) |
| TAC | Training Access Center |
| TAC | Terminal Attachment Council |
| TAC | Tactical Analysis Center |
| TAC | Tea Association of Canada |
| TAC | Triple Antibiotic Cream |
| TAC | Theater Aviation Company |
| TAC | Transports de l'Agglomération Châtelleraudaise (French public transit company) |
| TAC | Type of Assistance Code |
| TAC | Table Assignment Chart |
| TAC | Transfer At Cost |
| TAC | Test Analysis Controller |
| TAC | TBOS-ASCII Converter |
| TAC | Tibetan Association of Colorado, Inc. |
| TAC | Teacher Advisor Contact (Pius XI High School, Milwaukee, WI) |
| TAC | Tactical Applications Company |
| TAC | Turn Around Crew (airlines ramp agent) |
| TAC | Teen Advocacy Coalition |
| TAC | Tribal Air/Communications (New Tribes Mission aviation program) |
| TAC | Tactical Air Cargo (loader) |
| TAC | Task Action Commitment |
| TAC | Tactical Aviation Center |
| TAC | Target Acquisition Console |
| TAC | Telecommunication Association Council |
| TAC | Teleconferencing Association of Canada |
| TAC | Test Activation Center |
| TAC | The Athletes Course |
| TAC | Terra Aerocraft |
| TAC | Timor Aid for Children |
| TAC | Template Alignment Cube |
| TAC | Turbine-Alternator-Compressor |
| TAC | Treatment of Aluminium in Crucible (aluminum industry) |
| TAC | Target Analysis Center |
| TAC | Task Assignment and Control |
| TAC | Token Assignment Channel |
| TAC | Third Ave Crew (apparel company) |
| TAC | Tsuanmi-Affected Communities |
| TAC | Training Activities Coordinator |
| TAC | Texas Air Composites, Inc (Cedar Hill, TX) |
| TAC | The Assassin Clan (gaming clan) |
| TAC | Techniques Avancées de Communication (French: Advanced Technical Communication) |
| TAC | Training and Consultancy |
| TAC | Tertiary Admissions Centre (Australia) |
| TAC | Training Access Coordinator (Yale University; New Haven, CT) |
| TAC | Teacher Access Center (web application) |
| TAC | Theory and Applications of Categories (publication) |
| TAC | The Aerospace Corporation |
| TAC | Technical Advisory Committee |
| TAC | Tactical Assistance Center |
| TAC | The Austin Company (United Kingdom) |
| TAC | Terminal Attack Control |