| Acronym | Definition |
|---|
| FAT | File Allocation Table |
| FAT | Fatalities |
| FAT | Factory Acceptance Test |
| FAT | Faculty of Advanced Technology (University of Glamorgan; UK) |
| FAT | Freude am Tanzen (German band) |
| FAT | Faithful and True |
| FAT | Focal Atrial Tachycardia |
| FAT | Fashion Art Toronto (Toronto, Ontario, Canada) |
| FAT | Feature Attribute Table |
| FAT | Fashion Architecture Taste (architecture/interior design firm; London, UK) |
| FAT | First Article Test |
| FAT | Fluorescent Antibody Test |
| FAT | Floating-Arm Trebuchet |
| FAT | Forces Armees Togolaises (French: Togolese Armed Forces) |
| FAT | Fonds des Accidents du Travail (French) |
| FAT | First Article Testing |
| FAT | Financial Aid Transcript |
| FAT | Frequently Asked Topics |
| FAT | Final Acceptance Test |
| FAT | Fabulous and Thick |
| FAT | Forest and Trees |
| FAT | Fully Automatic Timing (track and field competition) |
| FAT | Fédération Autonome des Transports (French: Autonomous Federation of Transport) |
| FAT | Festival d'Automne de Toulouse (French: Toulouse Autumn Festival) |
| FAT | File Access Table (common but incorrect) |
| FAT | Fresh Air Time |
| FAT | Functional Acceptance Test(ing) |
| FAT | Fugitive Apprehension Team (law enforcement) |
| FAT | Famine and Temperature (weight loss program) |
| FAT | Flores Adventure Tours |
| FAT | Faithful Available and Teachable |
| FAT | Fédération d'Aïkido Traditionnel (French: Federation of Traditional Aikido; martial arts) |
| FAT | Football Association of Tanzania (now Tanzania Football Federation) |
| FAT | Florida Alfa Tango (dance group) |
| FAT | Fresno, CA, USA - Fresno Air Terminal (Airport Code) |
| FAT | Free Air Temperature |
| FAT | Foreign Area Translation |
| FAT | Field Acceptance Test |
| FAT | Forward Application Transport |
| FAT | Flight Aptitude Test (aviation; UK) |
| FAT | Fatty Acid Transferase |
| FAT | Fabrication, Assembly and Test |
| FAT | Flight Acceptance Test |
| FAT | Fixed Assets Tracking (software) |
| FAT | Final Acceptance Trial |
| FAT | Flexible, Adaptable and Teachable |
| FAT | Functional Area Team |
| FAT | Facility Acceptance Test |
| FAT | Funding Allowance Target (US Property and Fiscal Office) |
| FAT | Facilities Acquisition Team |
| FAT | Fool At Terminal |
| FAT | Flow Allocation Table |
| FAT | Federate Acceptance Test |
| FAT | Family Acknowledgement Tree |
| FAT | Faithful and Teachable (religious slang) |
| FAT | First Atlanta Tower |