| Abbreviation | Definition |
|---|---|
| HDC | Heartland Developers Conference |
| HDVC | High Definition Video Conference |
| HEALTHCOM | International Workshop on Enterprise Networking and Computing in Healthcare Industry |
| HFCC | High Frequency Co-ordination Conference |
| HFNC | Home Furnishings Networking Conference |
| HFPP | IEEE Conference on Human Factors and Power Plants |
| HFPSC | High-Frequency Post-graduate Student Colloquium |
| HFTC | Hydraulic Fracturing Technology Conference |
| HHC | HP Handheld Conference |
| HHNC | Healthcare Hospitality Network Conference |
| HHRC | Health and Human Rights Conference |
| HIC | Harrogate International Centre |
| HICAPP | Hawaii International Conference on System Sciences: Emerging Technology and APPlications |
| HICARC | Hawaii International Conference on System Sciences: ARChitecture Track |
| HICC | Harare International Conference Centre |
| HICE | Hawaii International Conference on Education |
| HICI | Hospitality Investment Conference Indonesia |
| HICKBS | Hawaii International Conference on System Sciences: Decision Support & Knowledge Based System Technology |
| HICL | Hamburg International Conference of Logistics |
| HICP | Hospitality Investment Conference Philippines |