| Code | CBU | Union/Employee Organization |
| CX | Clerical Unit | Coalition of University Employees (CUE) |
| SX | Service Unit | American Federation of State, County & Municipal Employees (AFSCME) |
| TX | Technical Unit | University Professional & Technical Employees (UPTE) |
| RX | Research Support Professionals Unit | University Professional & Technical Employees (UPTE) |
| PA | Police Officers Unit | Federation of University Police Officers Associations (FUPOA) |
| NX | Nurses Unit | California Nurses Association (CNA) |
| EX | Patient Care Technical Unit | American Federation of State, County & Municipal Employees (AFSCME) |
| HX | Health Care Professionals Unit | University Professional & Technical Employees (UPTE) |
| IX | Non-Senate Instructional Unit | American Federation of Teachers (AFT) |
| LX | Librarian Unit | American Federation of Teachers (AFT) |
| K8 | Skilled Crafts Unit | International Union of Operating Engineers, Local 501 (501) |
| BX | Academic Student Employees | United Auto Workers (UAW) |