| Acronym | Definition |
|---|
| IBU➣Ibuprofen |
| IBU➣International Biathlon Union |
| IBU➣International Bitterness Unit |
| IBU➣Intel Bios Update |
| IBU➣Internal Bus Unit |
| IBU➣Inshore Boat Unit (US Navy) |
| IBU➣International Boxing Union |
| IBU➣International Banking Unit |
| IBU➣International Budo University (Japan) |
| IBU➣Inland Boatman's Union |
| IBU➣Independent Business Unit |
| IBU➣Interference Blanker Unit |
| IBU➣Irish Bridge Union (card game) |
| IBU➣Industrial Bus Lines, Inc. |
| IBU➣Ýzzet Baysal Üniversitesi (Turkey) |
| IBU➣Ingenieursbureau Utrecht (Dutch: Engineering Utrecht; Netherlands) |
| IBU➣Itty Bitty Unit |
| IBU➣Intense Benguela Upwelling |
| IBU➣Inertia Breaking Unit |
| IBU➣Interesting But Unsubstantiated |