| Abbreviation | Definition |
|---|---|
| FTC | Fail To Close |
| FTO | Flow To Open |
| FTU | Failure Tensile Ultimate |
| GANIT | Growing Aptitude in Numerical Innovations and Training |
| GBAA | Geometry Buffer Anti Aliasing |
| GD&T | Geometric Dimensioning and Tolerancing |
| GF | Gravity Falls |
| GFS | Gravitational Field Strength |
| GM | General Machinist |
| GMBS | Guardian Mechanical and Building Services |
| GNBD | Global Network Block Device |
| GT | Glass Trace |
| GUM | Grammar Usage And Mechanics |
| GUM | Grammar, Usage, and Mechanics |
| HCCI | Homogeneous Charge Compression Ignition (Engine) |
| HCV | Helium Check Valve |
| HHMD | Hand-Held Metal Detector |
| HIT | Head Impact Test |
| HPSOV | High-Pressure Shutoff Valves |
| HQM | Hemi Quantal Mechanics |