| Abbreviation | Definition |
|---|---|
| FSP | File Sharing Protocol |
| FSR | Fast SRNC Relocation |
| FST | Family Social Time |
| FTA | File Transfer Agent |
| FTFR | Fault-Tolerant Fibonacci Routing |
| FTL | Free Talk Live |
| FTM | Fault Tolerant Modem |
| FTP | Foil Twisted Pair |
| FTRF | FirstTouch Radio Frequency expansion card |
| FTTD | Fiber To The Desk |
| FTTD | Fiber To The Dormitory |
| FTTH | Fiber To The Home |
| FTTH | Fiber To The House |
| FTTP | Fibre To The Premises |
| FTTX | Fiber To The X (X = anything) |
| FU | File Upload |
| FUD | Fast User Directory |
| FUN | FL4 Uniform Network |
| FUN | Follow Up Networking |
| FUN | Friends United in Networking |