| CSSD | Camden Special Services District 
| Others |
| CSSD | Canadians for Safe and Sober Driving
| Others |
| CSSD | Center for Sustainable Shale Development
| Others |
| CSSD | Center for the Study of Social Difference
| Others |
| CSSD | Central School of Speech and Drama
| Others |
| CSSD | Central Square School District
| Others |
| CSSD | Central sterile services department
| Others |
| CSSD | Central Sterile Services/Supplies Department
| Others |
| CSSD | Central Sterile Stores Department
| Others |
| CSSD | Central Sterile Supply Department
| Others |
| CSSD | Central Sterilization and Supply Department
| Others |
| CSSD | Central Support Service Department
| Others |
| CSSD | Certified Senior Smalltalk Developer
| Others |
| CSSD | Certified Specialist in Sports Dietetics
| Others |
| CSSD | Charter School of San Diego
| Others |
| CSSD | Child Support Services Department
| Others |
| CSSD | Children's Specialists of San Diego
| Others |
| CSSD | Cloneproof Schwartz Sequential Dropping
| Others |
| CSSD | Closed Source Software Development
| Others |
| CSSD | Combat Service Support Detachment
| Others |
| CSSD | Common Sense Self Defense
| Others |
| CSSD | Commonwealth Secondary School Diploma
| Others |
| CSSD | Community Support Services for the Deaf
| Others |
| CSSD | Computer Supported Simulations Division
| Others |
| CSSD | Computer Supported Spiritual Development
| Others |
| CSSD | Computing Services and Systems Development
| Others |
| CSSD | Cooperation for Social Services and Development
| Others |
| CSSD | Court Support Services Division
| Others |