| Acronym | Definition |
|---|
| CAU➣Conselho de Arquitetura E Urbanismo (Portuguese: Architecture and Urban Planning Council; Brazil) |
| CAU➣Consumer Affairs Unit (various locations) |
| CAU➣Clark Atlanta University |
| CAU➣Caucasian |
| CAU➣Christian-Albrechts-Universität (Christian Albrechts University; Kiel, Germany) |
| CAU➣Centro de Atención A Usuarios |
| CAU➣Cluster Aware Updating |
| CAU➣China Agricultural University |
| CAU➣Chang'an University (China) |
| CAU➣Cisco Aironet Uninstall |
| CAU➣Control Access Unit |
| CAU➣Carlos Albizu University (Miami, Florida) |
| CAU➣Commission of the African Union (Ethiopia) |
| CAU➣Cold Air Unit |
| CAU➣California Aeronautical University (Bakersfield, CA) |
| CAU➣Community Association Underwriters of America, Inc. (Newtown, PA) |
| CAU➣Cruel and Unusual |
| CAU➣Controlled Access Unit |
| CAU➣Child Abuse Unit (police incident code; New Zealand) |
| CAU➣Confederación Americana de Urología |
| CAU➣Customer Assistance Unit (various locations) |
| CAU➣Command Arithmetic Unit |
| CAU➣Carbon Adsorption Unit |
| CAU➣Cable Access Unit |
| CAU➣Covert Assault Unit (Counter Strike clan) |
| CAU➣Cybertron Alliance Universe |
| CAU➣Cell Adapter Unit |
| CAU➣Command Acquisition Unit (NASA) |
| CAU➣Client Assessment Unit (establishing disability) |
| CAU➣Command Activation Unit (NASA) |
| CAU➣Crew Access Unit (intercom equipment) |
| CAU➣Customer Acquisition Unit (NASA) |
| CAU➣Caribbean African Unity (New York) |
| CAU➣Central Arbitration Unit |
| CAU➣Crypto-Auxiliary Unit |
| CAU➣Communications Access Unit |
| CAU➣Cryptographic Ancillary/Authorization Unit |
| CAU➣Community Advice Unit |
| CAU➣Confédération d'Alliances Unies (French: Confederation of United Alliances; online gaming clan) |