| FOR | Freight on Road |
| FM | Frequency Modulation |
| FTP | File Transfer Protocol |
| FYI | For Your Information |
| FDI | Foreign Direct Investment |
| FEMA | Foreign Exchange Management Act |
| FAX | Facsimile |
| FHR | Fetal Heart Rate |
| FBI | Federal Bureau of Investigation |
| FCI | Food Corporation of India |
| FIFA | Federation Internationale de Football Association |
| FMCG | Fast-Moving Consumer Goods |
| FSSAI | Food Safety and Standards Authority of India |
| FAQ | Frequently Asked Question |
| FKA | Formerly Known As |
| FML | F*CK My Life |
| FTW | For The Win |
| FX | Fracture |
| FET Time Zone | Further-Eastern European Time (Standard Time) |
| FJST Time Zone | Fiji Summer Time (Daylight Saving Time) |
| FJT Time Zone | Fiji Time (Standard Time) |
| FKST Time Zone | Falkland Islands Summer Time (Daylight Saving Time) |
| FKT Time Zone | Falkland Island Time (Standard Time) |
| FNT Time Zone | Fernando de Noronha Time (Standard Time) |
