| Abbreviation | Definition |
|---|---|
| HHPC | Houay Ho Power Company |
| HHQ | Hickory Hill Quilt |
| HHQS | Hickory Hill Quilt Shop |
| HHRC | Heartbreak Hill Running Company |
| HHRR | Human Health Risk Resources |
| HHS | HumbleHomeStore |
| HHSC | Hawaii Health Systems Corporation |
| HHSD | H and H Systems and Design |
| HHSL | Hectic Helper Services Ltd |
| HHTC | Hand in Hand Trust Corporation |
| HHTC | Handsworth and Hallam Theatre Company |
| HHTC | Helen Hayes Theatre Company |
| HHTC | Hemel Hempstead Theatre Company |
| HHTI | Humphrey Hospitality Trust Inc |
| HI | Higherlife International |
| HI | Hospitality Industry |
| HI | Hostelling International |
| HIA | Housing Industry Association |
| HIAA | Health Insurance Association of America |
| Hiab | Hydrauliska Industri AB |