| Abbreviation | Definition |
|---|---|
| FMS | Fieldbus Messaging System |
| FMT | Forward My Tweet |
| FNB | Flexible Network Bus |
| FNBA | Flexible Network Bus Adapter |
| FNE | Fixed Network Equipment |
| FNL | Friday Networking Lunch |
| FNNG | Foreign National Networking Group |
| FNS | FDDI Network Services |
| FOC | Firm Order Commitment |
| FOIS | Fiber Optic Installation Services. |
| FOL | Fiber Optic Link |
| FOLS | Fiber Optic LAN Section |
| FOM | Fiber Optic Modem |
| FOOF | Fiber Optic services Over FTTP |
| FPAN | Forest Philanthropy Action Network |
| FPGA | Field Programmable Gate Array |
| FPO | Frame Pointer Omission |
| FPPR | Full Packets Production Rate |
| FPTP | Fully Programmable Transport Protocol |
| FQDN | Fully Qualified Domain Name |