| Acronym | Meaning |
| SSS | Selective Service System (US government) |
| SSS | Safety and Security Service (United Nations) |
| SSS | Sapper Squad Set |
| SSS | Science, Society and Solutions (US Geological Survey) |
| SSS | Scout Sniper School |
| SSS | Sea Scout Ship |
| SSS | Sea Surface Search |
| SSS | Security Support Squadron |
| SSS | Senior Service School |
| SSS | Ship to Shore to Ship |
| SSS | Shipbuilder Special Study |
| SSS | Short Sea Shipping |
| SSS | Side Scan Sonar |
| SSS | Signature Security Service |
| SSS | Sikça Sorulan Sorular (Turkish: Frequently Asked Questions) |
| SSS | Single Shelter Switch |
| SSS | Single Support Strategy |
| SSS | Site Security Supervisor |
| SSS | Small Shelter System |
| SSS | Small Ship Server |
| SSS | Small Structure Survey |
| SSS | Smart, Successful Scotland |
| SSS | Sound Suppression System (various organizations) |
| SSS | Source Selection Sensitive |
| SSS | Source Selection Survey |
| SSS | Souvenir Stamp Sheet (Australia) |
| SSS | Soviet Secret Service |
| SSS | Space Shuttle System (US NASA) |
| SSS | Special Safeguards Study |
| SSS | Special Security Service (various locations) |
| SSS | Special Security Squadron |
| SSS | Staff Summary Sheet (US DoD) |
| SSS | Standard Software/Supply System |
| SSS | Standard Supply Service |
| SSS | Standardized Scheduling System |
| SSS | Start Stop Sequencing |
| SSS | State Security Services (Nigeria) |
| SSS | Station Set Specification (US NASA) |
| SSS | Stop Smoking Service (National Health Service; UK) |
| SSS | Storage Serviceability Standard |
| SSS | Strafe Scoring System |
| SSS | Strategic Deterrent Forces (Russia) |
| SSS | Strategic Sealift Ships |
| SSS | Strategic Storage Site |
| SSS | Strike Support Ship |
| SSS | Suitability/Supportability Statement |
| SSS | Supersonic Sea Skimmer |
| SSS | Supplementary Safety System |
| SSS | Support Service Subcontractor |
| SSS | Survivable Satellite System |
| SSS | Survivable Storage System |
| SSS | Syndromic Surveillance System (public health) |
| SSS | System Segment Specification |
| SSS | System Support Services |
| SSS | System Support Staff (various locations) |
| SSS | System/Subsystem Specification |