| Abbreviation | Definition |
|---|---|
| GRDC | Ginetta Racing Drivers Club |
| GTF | Generalized Timing Formula |
| GXC | GDI-to-XPS Conversion |
| HAWTTWWOA | Hello and welcome to the wonder world of adventure |
| HCT | Hardware Compatibility Test |
| HD | Hard Drive |
| HDD | Hard Disk Drive |
| HDD | Host Device Driver |
| HDK | Hardware Development Kit |
| HDMI | High-Definition Multimedia Interface |
| HFP | Hands-Free Profile |
| HFS | Hardware Functionality Scan |
| HID | Human Interface Device |
| HPC | High-Performance Computing |
| HPD | Hot Plug Detect |
| HPET | High Precision Event Timer |
| HPNA | Home Phone Network Adapter |
| HWA | Host Wire Adapter |
| I2C | Inter-Integrated Circuit |
| I2O | Intelligent Input/Output |