| SSU | s for Study Tour 
| Others |
| SSU | Sacramento State University
| Others |
| SSU | Salem State University
| Others |
| SSU | Salisbury State University
| Others |
| SSU | Satellite Student Union
| Others |
| SSU | Savannah State University
| Others |
| SSU | Saybolt Seconds Universal
| Others |
| SSU | Scientific Support Unit
| Others |
| SSU | Seamless Software Update
| Others |
| SSU | Searching and Service in Unity
| Others |
| SSU | Seat Stays Up
| Others |
| SSU | Secondary Sampling Unit
| Others |
| SSU | Secret Service Unity
| Others |
| SSU | Secure Semireliable UDP
| Others |
| SSU | Security Services Unit
| Others |
| SSU | Select Size Unit
| Others |
| SSU | Self Sustainability Unit
| Others |
| SSU | Service Sector Unit
| Others |
| SSU | Servicing Stack Update
| Others |
| SSU | Servicing Stack Updates
| Others |
| SSU | Session Support Utility
| Others |
| SSU | Shared Services Unit
| Others |
| SSU | Shawnee State University
| Others |
| SSU | Shawnee State University, Portsmouth, Ohio
| Others |
| SSU | Shin Sekai Underwear
| Others |
| SSU | Ship Support Unit
| Others |
| SSU | Singe Stage Urethane
| Others |
| SSU | Sleep Story Universe
| Others |
| SSU | Sleepy Stories Universe
| Others |
| SSU | Smart Start Unit
| Others |
| SSU | Social Sciences Unit
| Others |
| SSU | Social Strategic Unit
| Others |
| SSU | Sokoto State University, Sokoto
| Others |
| SSU | Sonoma State
| Others |
| SSU | Sonoma State University
| Others |
| SSU | Sonoma State University's
| Others |
| SSU | Southern States University
| Others |
| SSU | Southwest State University
| Others |
| SSU | Space Science Update
| Others |
| SSU | Space Soldiers Unit
| Others |
| SSU | Space Station Utilization Office
| Others |
| SSU | Special Security Unit
| Others |
| SSU | Special Security Unit (Sindh)
| Others |
| SSU | Sprinkler Spray Upright
| Others |
| SSU | Star Sensor Unit
| Others |
| SSU | Start Stop Unit
| Others |
| SSU | Steady State Universe
| Others |
| SSU | Strategic Service Unit
| Others |
| SSU | Stratospheric Sounding Unit
| Others |
| SSU | Sunny Side Up
| Others |
| SSU | Super Sport Utility
| Others |
| SSU | Suwa Suwei Unta
| Others |
| SSU | Sveriges Socialdemokratiska Ungdomsfrbund
| Others |
| SSU | Swarthmore Students Union
| Others |
| SSU | Switch Supervisory Unit
| Others |
| SSU | Synchronization Supply Unit
| Others |
| SSU | System Setup Utility
| Others |
| SSU | System Start Up
| Others |
| SSU | System Support Unit
| Others |