| CBU | California Babes United 
| Others |
| CBU | California Baptist University
| Others |
| CBU | California Basketball University
| Others |
| CBU | Capacity Backup
| Others |
| CBU | Cape Breton University
| Others |
| CBU | Cape Breton University (Sydney, Nova Scotia, Canada)
| Others |
| CBU | Caribbean Broadcasting Union
| Others |
| CBU | Case Building Unit
| Others |
| CBU | Cement Board Underlayment
| Others |
| CBU | Cementious Backerboard Unit
| Others |
| CBU | Center for ByProducts Utilization
| Others |
| CBU | Central Brake Unit
| Others |
| CBU | Christian Believers United
| Others |
| CBU | Christian Brothers U
| Others |
| CBU | Christian Brothers University
| Others |
| CBU | Citizens for Balanced Use
| Others |
| CBU | City of Bloomington Utilities
| Others |
| CBU | Cloud Backup
| Others |
| CBU | Cloud Business Unit
| Others |
| CBU | Cluster Bomb Unit
| Others |
| CBU | Cluster Box Units
| Others |
| CBU | Collective Bargaining Unit
| Others |
| CBU | Combined Benefits United
| Others |
| CBU | Communications Billing & Usage Database
| Others |
| CBU | Communications Billing Usage
| Others |
| CBU | Comodo Backup
| Others |
| CBU | Competitive Business Unit
| Others |
| CBU | Complete Build-up Unit
| Others |
| CBU | Complete Built Up
| Others |
| CBU | Complete Builtup Unit
| Others |
| CBU | Completed Body Unit
| Others |
| CBU | Completely Built Unit
| Others |
| CBU | Completely Built Units
| Others |
| CBU | Completely Built Up
| Others |
| CBU | Completely Built-in Unit
| Others |
| CBU | Components Business Unit
| Others |
| CBU | Computational Biology Unit
| Others |
| CBU | Computer Back up
| Others |
| CBU | Conference Bridge Unit
| Others |
| CBU | Consolidated Backup
| Others |
| CBU | Construction Battalion Unit
| Others |
| CBU | Consumer Business Unit
| Others |
| CBU | Core Business Unit
| Others |