| Abbreviation | Definition |
|---|---|
| FUT | First User Trial |
| FUT | Friendly User Trial |
| FWLL | Fixed Wireless Local Loop |
| FXC | Fiber Cross-Connect |
| GA | Group Address |
| GACL | Grid Access Control List |
| GAIN | Global Access Information Network |
| GALA | Global Access to Local Applications |
| GALS | Globally Asynchronous, Locally Synchronous |
| GAM | Global Account Manager |
| GAN | Global Area Network |
| GAON | Gigabit Active Optical Networks |
| GAP | Guidance Access Point |
| GARP | Generic Attribute Registration Protocol |
| GAS | Generic Application Server |
| GASP | Generator and Analyzer System for Protocols |
| GASS | Global Access to Secondary Storage |
| GbE | Gigabyte Ethernet |
| GBIC | GigaBit Interface Converter |
| GBIT | GigaBit |