| Abbreviation | Definition |
|---|---|
| GTO | Graphic Tube Original |
| GTR | Golden Triode Reference |
| GTRN | General Transient |
| GTS | GEM (Generic Equipment Model) Test System |
| GVI | General Visual Inspection |
| GWE | Giga Watt electrical |
| GWE | Giga Watts electrical |
| GWEC | Golden Way Electronics Corp |
| GWP | GigaWatt (Power) |
| GWSSUS | Gaussian Wide-Sense Stationary Uncorrelated Scattering |
| H | form H (break; break) contacts |
| H | Heater |
| H | Henry |
| H | Hybrid |
| HA | Handset Amplifier |
| HAC | Hazardous Area Classification |
| HAD | Hole Accumulated Diode |
| HADES | Hyperalgesia After Deep Electrical Stimulation |
| HAEV | High Amplitude Electric Vibrator |
| HAIN | Hydroacoustic Aided Inertial Navigation |