| Abbreviation | Definition |
|---|---|
| IPDR | International Project Development Roadmap |
| IPE | International Political Economy |
| IPI | International Payment Instruction |
| IPM | International Project Management |
| IPO | International Purchase Office |
| IPO | Internationale Pruefungs Ordnung |
| IPR | Intellectual Property Rights |
| IPR | International Product Registration |
| IPS | Indian Pokkiri Service |
| IPTC | International Press Telecommunications Council |
| IPTP | Indo-Pacific Tuna Programme |
| IQ | International Quality |
| IRD | Inland Revenue Department |
| IRIS | International Retail Information System |
| IRL | ISO-Revenue Line |
| IRO | International Relations Officer |
| IRS | Internal Revenue Service |
| ISA | Industry Sub-sector Analysis |
| ISA | International Sugar Agreement |
| ISAC | Industry Sector Advisory Committee |