| Acronym | Definition |
|---|
| SSE | Solar System Exploration |
| SSE | Streaming SIMD (Single Instruction Multiple Data) Extensions |
| SSE | Scottish and Southern Energy (UK electricity and gas provider) |
| SSE | Shanghai Stock Exchange |
| SSE | Stockholm School of Economics (Stockholm, Sweden) |
| SSE | Shenzhen Stock Exchange |
| SSE | Seed Savers Exchange (Decorah, Iowa) |
| SSE | Simple Sharing Extensions (for RSS and OPML) |
| SSE | South-Southeast |
| SSE | Software Systems Engineering |
| SSE | Systems Security Engineering |
| SSE | School for Social Entrepreneurs |
| SSE | Senior Software Engineer |
| SSE | Society for Scientific Exploration |
| SSE | Subspace Emissary (gaming, Smash Bros.) |
| SSE | Sign Supported English (United Kingdom) |
| SSE | Systematic Software Engineering (Aarhus, Denmark) |
| SSE | Sum of Squared Error |
| SSE | Spaceship Earth (Walt Disney Epcot ride) |
| SSE | Safe Shutdown Earthquake |
| SSE | Sensitive Site Exploitation |
| SSE | Small-Scale Enterprise |
| SSE | System Safety Engineering |
| SSE | Sum of Squares due to Error |
| SSE | Signal Security Element |
| SSE | Software Support Environment |
| SSE | Short Service Employee |
| SSE | Size of Source Effect |
| SSE | Silicon Switching Engine (Cisco) |
| SSE | Silk Screen Effect (display artifact) |
| SSE | Smith's School of English (Japan) |
| SSE | Society of St. Edmund (religious order) |
| SSE | Shipper's Security Endorsement |
| SSE | Site Server Express |
| SSE | Space Support Equipment |
| SSE | Society of Software Engineers |
| SSE | Soap Suds Enema |
| SSE | Steady State Error |
| SSE | Sterile Speculum Exam |
| SSE | Support Systems Engineering (Sprint) |
| SSE | Static Source Error (aircraft) |
| SSE | Special Support Equipment |
| SSE | SATCOM System Expert (US DoD) |
| SSE | Simulation Support Environment |
| SSE | Safe Storage Enclosure |
| SSE | Structural Systems and Engineering |
| SSE | Secondary Symbol Estimation (data compression) |
| SSE | Space Support Element |
| SSE | Sedimentological Society of Egypt |
| SSE | Sunrise Sports and Entertainment |
| SSE | Sime Sembcorp Engineering Sdn Bhd |
| SSE | State Signaling Event |
| SSE | System Status Evaluation |
| SSE | Sun Sensor Electronics |
| SSE | Speed School of Engineering (University of Louisville) |
| SSE | Stationary Source Enforcement |
| SSE | Safe Shutdown Event |
| SSE | Southern Star Elites (World of Warcraft guild) |
| SSE | Sussex School of Education (UK) |
| SSE | Single Simulation Exercise |
| SSE | Support System Evaluation |
| SSE | Strategic Systems Engineering |
| SSE | Secure Seal Encoding (EnSeal Systems) |
| SSE | Society for Sensible Explanations (Seattle, WA) |
| SSE | Site Selection Evaluation |
| SSE | Ship Sulfur Emissions |
| SSE | Saipem Sharjah Engineering |
| SSE | Spontaneous Source Emission |
| SSE | Spatial Spectrum Estimation |
| SSE | Software-Specific Self Efficacy |
| SSE | Singapore Salvage Engineers Pte Ltd |
| SSE | Special Services Engineering |
| SSE | Supervisor's Safety Education |
| SSE | Single Source Extended |
| SSE | Special/Standard/Surface Support Equipment |
| SSE | Shell Small Engine, Inc (Conway, SC) |