SSSN
| Acronym | Definition |
|---|---|
| SSSN | SADC (South African Development Community) Seed Security Network |
| SSSN | Super Secret Spy Network |
| SSSN | Swiss Sentinel Surveillance Network (est. 1986) |
| SSSN | Straight Spouse Support Network (El Cerrito, CA) |
| SSSN | Siddha Samaz Sewa Nepal (Kathmandu, Nepal) |
| SSSN | System Subsystem Sub-Subsystem Numbering (MIL-STD-1808) |