| CSSE | Canadian Society for Senior Engineers 
| Others |
| CSSE | Canadian Society for the Study of Education
| Others |
| CSSE | Canadian Society Of Safety Engineering
| Others |
| CSSE | Canadian Society of Safety Engineers
| Others |
| CSSE | Center for Social Studies Education
| Others |
| CSSE | Center for Student Success and Engagement
| Others |
| CSSE | Center for Systems and Software Engineering
| Others |
| CSSE | Centre for Social Services Engineering
| Others |
| CSSE | Certified Six Sigma Executive
| Others |
| CSSE | combat Service support element
| Others |
| CSSE | Computational Systems Software Environment
| Others |
| CSSE | Computer Science and Software Engineering
| Others |
| CSSE | Computer Science and System Engineering
| Others |
| CSSE | Computer Science Software Engineering
| Others |
| CSSE | Computer Services System Engine
| Others |
| CSSE | Computer Systems Science and Engineering
| Others |
| CSSE | Consortium for Selective Schools in Essex
| Others |
| CSSE | Consortium of Selective Schools in Essex
| Others |
| CSSE | Control System Simulation Equipment
| Others |
| CSSE | Council of Soil Science Examiners
| Others |
| CSSE | Critical and Sociocultural Studies in Education
| Others |