| Acronym | Definition |
|---|
| CBU | Cape Breton University (Sydney, Nova Scotia, Canada; formerly University College of Cape Breton) |
| CBU | Christian Brothers University (Memphis, TN, USA) |
| CBU | California Baptist University |
| CBU | Cluster Bomb Unit |
| CBU | Copperbelt University (Zambia) |
| CBU | Cross-Border University (Finnish-Russian) |
| CBU | Caribbean Broadcasting Union |
| CBU | Cluster Box Unit (mailboxes) |
| CBU | Clave Bancaria Única (Spanish: Single Banking Code; Argentina) |
| CBU | Completely Built Units |
| CBU | Contrat de Bon Usage (French: Contract of Good Use; health care) |
| CBU | Collective Bargaining Unit |
| CBU | Cord Blood Unit |
| CBU | Construction Battalion Unit (Navy) |
| CBU | Core Business Unit |
| CBU | Commodity Business Unit |
| CBU | Capacity Backup Upgrade (IBM E-Server technology) |
| CBU | Cottbus Germany (airport code) |
| CBU | Central Business Unit |
| CBU | City of Bloomington Utilities (munipal water company; Indiana) |
| CBU | Celal Bayar Universitesi (Turkey) |
| CBU | Calibrate Before Use |
| CBU | conference bridge unit (US DoD) |
| CBU | Carbon Based Unit (human) |
| CBU | Consistent Battlespace Understanding |
| CBU | Consortium of British Universities (Pakistan) |
| CBU | Complete Build-up Unit (vehicle manufacturing/shipping) |
| CBU | Circulate Bottoms Up (oilfield) |
| CBU | Cement Board Unit |
| CBU | Cost Build Up (economics) |
| CBU | chronic baroreceptor unloading |
| CBU | Cute but Useless |
| CBU | Cementious Backer Unit (cement board Used for supporting tile) |
| CBU | Canisterized Bomblet Unit |