| FLASH | Facilitating Learning About Sexual Health 
| Others |
| FLASH | Facilitating Learning About Social Health
| Others |
| FLASH | Factual Lines About Submarine Hazards
| Others |
| FLASH | Family Life And Sexual Health
| Others |
| FLASH | Fastest Legal All Street Harley
| Others |
| FLASH | Firearms Liquor and Second Hand Goods Control
| Others |
| FLASH | First Laser Amplified Superluminal Hookup
| Others |
| FLASH | First Lutheran After-School Happening
| Others |
| FLASH | Fit Ladies Always Stay Healthy
| Others |
| FLASH | Flexible LIREC Autonomous Social Helper
| Others |
| FLASH | Frictionless Levitated Accelerated Subsurface Hypertrain
| Others |
| FLASH | Fun Learning After School Hours
| Others |
| FLASH | Fun Leisure Access Savings And Health
| Others |
| FLASH | Fun, Leisure, Activities, Services, and Holidays
| Others |