| Clinica Urbari | Medical | CU |
| Columbia University | University | CU |
| Clean Up | Regional | CU |
| Currency Units | Ocean Science | CU |
| See you (later) | Internet Slang | CU |
| Credit Union | Misc | CU |
| Calicut University | Kerala State University | CU |
| Course Unit | University | CU |
| Cubic | Unit of Measurement | CU |
| Coach University | University | CU |
| Clemency Uganda | Organization | CU |
| Composite User | Computer and Networking | CU |
| Component Units | Military and Defence | CU |
| Cubic Capacity | Military and Defence | CU |
| Crusaders Union | Organization | CU |
| Undrain Consolidation Triaxial Test | Earth Science | CU |
| piezoelectric crystal unit | Government | CU |
| Clothes-2-U | Organization | CU |
| Capacity Utilization | Networking | CU |
| Clemson University | University | CU |
| chronic urticaria | British Medicine | CU |
| Collision Unconformity | Physics Related | CU |
| Çukurova Üniversitesi | Turkish | CU |
| Control Unit | Computing | CU |
| Call Up | Military | CU |
| close-up | Government | CU |
| cryptographic unit, 7 | Government | CU |
| First Trust ISE Global Copper Index Fund | NASDAQ Symbol | CU |
| Casein Units | Measurement Unit | CU |
| Centro pro Unione | Organization | CU |
| See You | SMS | CU |
| Consumers Union | Union | CU |
| Champaign-Urbana | University | CU |
| CHAGALLU | Indian Railway Station | CU |
| customer premise | Government | CU |
| Common Unit | Military and Defence | CU |
| Citizens Union | Organization | CU |
| Cross Up | Sports | CU |
| Coming Unglued | Internet Slang | CU |
| Cumhuryyet Unv | Organization | CU |
| Concern Universal | Organization | CU |
| City University | Organization | CU |
| Children United | Organization | CU |
| Cranfield University | Organization | CU |
| Cunas Uruguayas | Organization | CU |
| Common User | Military | CU |
| Classification Unit | US Government | CU |
| Calcutta University | West Bengal State University | CU |
| Carleton University | University | CU |
| Channel Unit | Telecom | CU |
| Corporate University | Business | CU |
| Cubic Unit | Measurement Unit | CU |
| Copper | Chemistry | CU |
| Cigar Unemployment | Funny | CU |
| Cornell University | University | CU |
| Carlton University | University | CU |
| Call Unix | Computer Assembly | CU |
| Cuba | Countries | CU |
| Cutler- Hammer | Government Supplier | CU |
| Close Up | Media | CU |
| Christian Union | Religious | CU |
| Cut Up | Other | CU |
| Catch Up | University | CU |
| Concerned Unit | Military and Defence | CU |
| Children's University | Gujarat State University | CU |
