| Abbreviation | Definition |
|---|---|
| IM | Irish Mob |
| IMA | Indore Management Association |
| IMAO | International Maritime Arbitration Organisation |
| IMBA | Indiana Mortgage Bankers Association |
| IMBJ | Incorporated Master Builders Association of Jamaica |
| IMBT | Iron Masters Board of Trade |
| IMC | Industrial Medical Council |
| IME | Institute for Media and Entertainment |
| IME | Institute of Makers of Explosives |
| IME | Institute of Mechanical Engineers |
| IME | Institution of Mechanical Engineers |
| IMI | International Masonry Institute |
| IMKC | Inspired Minds Kansas City |
| IMLS | Institute of Museum and Library Services |
| IMMEC | Impianti Meccanici |
| IMO | Independent Monitoring Organization |
| IMO | International Maratime Organisation |
| IMO | Irish Medical Organisation |
| IMRO | Investment Management Regulatory Organisation, LTD. |
| IMS | International Meat Secretariat |