| SSN | Attack Submarine, Nuclear 
| Others |
| SSN | Nuclear-powered Attack Submarine (Submarine, Submarine, Nuclear)
| Others |
| SSN | Sales Sequenced Number
| Others |
| SSN | Sason railway station
| Others |
| SSN | Saturdays Sundays and Nights
| Others |
| SSN | Saturdays, Sundays, and Nights
| Others |
| SSN | Scholars Strategy Network
| Others |
| SSN | Secret Surveillance Node
| Others |
| SSN | Secure Server Network
| Others |
| SSN | Securities Service Network
| Others |
| SSN | Security Of Systems And Networks
| Others |
| SSN | Security Systems News
| Others |
| SSN | Seed Savers' Network
| Others |
| SSN | Segment Sequence Number
| Others |
| SSN | Segment Serial Number
| Others |
| SSN | Selective Service Number
| Others |
| SSN | Semantic Sensor Network
| Others |
| SSN | Semantic Social Network
| Others |
| SSN | Senior Staff Nurse
| Others |
| SSN | Seoul Air Base
| Others |
| SSN | Serie Speciale Numerata
| Others |
| SSN | Servicio Sismológico Nacional
| Others |
| SSN | Servizio Sanitario Nazionale
| Others |
| SSN | Session Service
| Others |
| SSN | Setanta Sports News
| Others |
| SSN | Severely Sub-Normal
| Others |
| SSN | Ship Submersible Nuclear
| Others |
| SSN | Ship, Submersible, Nuclear
| Others |
| SSN | Significant Support Needs
| Others |
| SSN | SIM Serial Number
| Others |
| SSN | Simultaneous Switching Noise
| Others |
| SSN | Sky Sports News
| Others |
| SSN | Social Security Number
| Others |
| SSN | Social Security Numbers
| Others |
| SSN | Soul of the South Network
| Others |
| SSN | Space Surveillance Network
| Others |
| SSN | Special Services Network
| Others |
| SSN | Special Social Needs Vehicle
| Others |
| SSN | Species Survival Network
| Others |
| SSN | Sprint Series of Nebraska
| Others |
| SSN | Sri Sivasubramaniya Nadar
| Others |
| SSN | Standard Study Number
| Others |
| SSN | Station Serial Number
| Others |
| SSN | Stoom Stichting Nederland
| Others |
| SSN | Stop Safely Now
| Others |
| SSN | Storage System Number
| Others |
| SSN | Street Stock Nation
| Others |
| SSN | Student Success Network
| Others |
| SSN | Student Sustainability Network
| Others |
| SSN | Sub Sector North
| Others |
| SSN | Sub Surface Nuclear
| Others |
| SSN | Sub System Number
| Others |
| SSN | Sub-Sector North
| Others |
| SSN | Submarine, Submarine, Nuclear (Nuclear powered attack Submarine)
| Others |
| SSN | Submerged Ship, Nuclear
| Others |
| SSN | Submersible Ship Nuclear
| Others |
| SSN | Subsystem Number
| Others |
| SSN | Sun Spot Number
| Others |
| SSN | Super Street Nationals
| Others |
| SSN | Super Street Network
| Others |
| SSN | Superior Salivary Nucleus
| Others |
| SSN | Surgical Segment Navigator
| Others |
| SSN | Switched Service Network
| Others |
| SSN | System Study Number
| Others |