| Acronym | Definition |
|---|
| DAT | Data (file name extension) |
| DAT | Digital Audio Tape |
| DAT | Datum |
| DAT | Disaster Action Team |
| DAT | Design and Technology (various organizations) |
| DAT | Dental Admissions Test |
| DAT | Dative (grammar) |
| DAT | Département de l'Aménagement du Territoire (French: Department of Regional Planning; Luxembourg) |
| DAT | Dopamine Transporter |
| DAT | Day After Tomorrow (film) |
| DAT | Danish Air Transport (est. 1989) |
| DAT | Days After Treatment (agricultural science) |
| DAT | Déclaration d'Accident du Travail (French: Work Accident Statement) |
| DAT | Dementia of Alzheimer Type (diagnosis) |
| DAT | Deutsche Automobil Treuhand GmbH (German Automobile Trust) |
| DAT | Data Analysis Tool |
| DAT | Days After Transplanting |
| DAT | Defence Against Terrorism |
| DAT | Data Analysis Team |
| DAT | Disk Allocation Table |
| DAT | Disk Array Technology |
| DAT | Direct Access Transport |
| DAT | Deformation and Tessellation |
| DAT | Direct Access Testing |
| DAT | Data Access Tool |
| DAT | Disk Access Time |
| DAT | Data File |
| DAT | Dynamic Address Translation |
| DAT | Drug Abuse Testing (various organizations) |
| DAT | Drug Action Team (UK) |
| DAT | Direct Antiglobulin Test |
| DAT | Damage Assessment Team |
| DAT | Drug and Alcohol Testing (US Military Entrance Processing Station) |
| DAT | Differential Aptitude Test |
| DAT | Documentation et Assistance Technique (French: Documentation and Technical Assistance) |
| DAT | Direct Access Trading |
| DAT | Delivered at Terminal |
| DAT | Desk Appearance Ticket (summons issued to violator in lieu of arrest) |
| DAT | Dine About Town (San Francisco) |
| DAT | Dementia of Alzheimer Type |
| DAT | Deposito Aduanero Temporal (Spanish: Temporary Customs Warehouse) |
| DAT | Special Patrol (O/T forms - obsolete) |
| DAT | Disability Awareness Training |
| DAT | Division of Apprentice Training (Massachusetts) |
| DAT | Discharge Air Temperature |
| DAT | Détachement Avancé des Transmissions (French: Advanced Signals Detachment) |
| DAT | Department Approved Training (Iowa) |
| DAT | Diet As Tolerated |
| DAT | Disaster Assistance Team (American Red Cross) |
| DAT | Downtown Action Team |
| DAT | Direct Antiglobulin Testing |
| DAT | Darang Deng (SIL code, China) |
| DAT | Distributed Active Transformer |
| DAT | Double Acting Tanker |
| DAT | Direct Access Technology |
| DAT | Duplicate Address Test |
| DAT | Diskaholics Anonymous Trio (band) |
| DAT | Data Assurance Team |
| DAT | Database Advanced Training |
| DAT | Directorate of Army Training (Canadian Armed Forces) |
| DAT | Department of Advanced Technology |
| DAT | Design-a-trial |
| DAT | Digital Archive Tape |
| DAT | Data Assessment Tool |
| DAT | District Action Team |
| DAT | Dynamic Algorithm Transform |
| DAT | Development Around Transit |
| DAT | Directorate of Labour Inspection (Norway) |
| DAT | Deployment Action Team (JDA) |
| DAT | Disputes Automated Tracking |
| DAT | Days After Term Award |
| DAT | Development Acceptance Test |
| DAT | Direction of Arrival Tracking |
| DAT | Disconnect Actuating Tool |
| DAT | Design Assurance Testing |
| DAT | Development Assist Test |
| DAT | Days After Tasking |
| DAT | Design Acceptance/Approval Test |
| DAT | Digital Analog Trunk (telecommunications) |
| DAT | Digitool Applied Technologies |
| DAT | Demilitarization Alternative Technology |
| DAT | Dumb A$$ Tanker |