| Abbreviation | Definition |
|---|---|
| HP | Hindustan Petroleum |
| HPAE | High Performing Asian Economies |
| HPC | High Performance Computer |
| HQ | High Quality |
| HS | Harmonized System |
| HST | Harmonized Sales Tax (Canada) |
| HTS | Harmonized Tariff Schedule |
| HTS | Harmonized Tariff System |
| HTSUS | Harmonized Tariff Schedule of the United States |
| HWA | Hold Without Action |
| I03 | Information Object Oriented Obsidian 3 |
| IACCI | Israel-Azerbaijan Chamber of Commerce |
| IADB | Inter American Development Bank |
| IADB | International Aid and Development Business |
| IAEL | International Atomic Energy List |
| IAFL | International Association of Forensic Linguists |
| IAS | International Approval Services |
| IATA | International Air Transport Associaton |
| IaW | Ideas at Work (Cambodia) |
| IBAM | International Business And Managment |