CSSU
| Acronym | Definition |
|---|---|
| CSSU | Combat Service Support Unit (US DoD) |
| CSSU | Chittenden South Supervisory Union (Shelburne, VT) |
| CSSU | Crime Scene Search Unit (various locations) |
| CSSU | Computer Science Student Union |
| CSSU | Cascading Style Sheets University |
| CSSU | Christadelphian Sunday School Union (publications and teacher resources) |
| CSSU | Centro Studi Scenari Urbani (Italian: Center for Studies on Urban Terrain; Lumsa University; Rome, Italy) |
| CSSU | Central Sterile Supply Unit (various organizations) |