| Acronym | Definition |
|---|
| SS | Self-Service |
| SS | Steam Ship (nautical vessel designation; also see MS for motor ship) |
| ss | Scilicet (Latin: to Wit, Namely) |
| SS | Schutzstaffeln (WWII, German) |
| SS | Sunset |
| SS | Social Services |
| SS | Social Security |
| SS | Stainless Steel |
| SS | Sunshine |
| SS | Shortstop (baseball) |
| SS | Saints |
| SS | Susceptibility |
| SS | Submarine (conventional) |
| SS | Sassari (Sardinia, Italy) |
| SS | Shell Script |
| SS | Sommersemester (German: summer semester) |
| SS | Search String |
| SS | Social Studies |
| SS | Social Science |
| SS | Solid State |
| SS | Super Sport |
| SS | Secret Service |
| SS | Steady State (control systems engineering) |
| SS | Sammy Sosa (baseball) |
| SS | Spreadsheet |
| SS | Solar System |
| SS | Space Shuttle |
| SS | Secondary School |
| SS | Sample Size |
| SS | Starship (science fiction) |
| SS | Same Size |
| SS | Sunday School |
| SS | So Sorry |
| SS | Security Service (MI5) |
| SS | Six Sigma |
| SS | Supersonic |
| SS | Software Support |
| SS | Space Systems |
| SS | Space Station |
| SS | Screen Saver |
| SS | Sesame Street |
| SS | Safe and Secure |
| SS | Surround Sound |
| SS | Special Stage |
| SS | Steven Spielberg (director) |
| SS | Supersede |
| SS | Southend On Sea (postcode, United Kingdom) |
| SS | Southend-On-Sea (British postcode) |
| SS | So Sweet |
| SS | Safe Sex |
| SS | Slow Start |
| SS | State School (Australia) |
| SS | Svensk Standard (Swedish Standard) |
| SS | San Sebastián |
| SS | Screen Shot |
| SS | Silver Star |
| SS | Swedish Standards |
| SS | Single Source |
| SS | Sharepoint Server (Microsoft) |
| SS | Spongebob Squarepants (cartoon) |
| SS | Super Star |
| SS | Single Speed (bicycles) |
| SS | Subspace (gaming) |
| SS | System Support |
| SS | Single Shot |
| SS | Service System (Bellcore) |
| SS | Spread Spectrum |
| SS | Single Strand (DNA) |
| SS | Silver Surfer |
| SS | Shared Services (IBM) |
| SS | Strong Safety (football) |
| SS | Strip Search |
| SS | Secret Society |
| SS | Short Stop (baseball/softball position) |
| SS | Super Stock (racing category) |
| SS | Single Sided |
| SS | SummerSlam (WWF PPV event) |
| SS | Structural Steel |
| SS | Sickle Cell Disease (genetics) |
| SS | Survivor Series (WWF PPV event) |
| SS | Sum of Squares |
| SS | Support Software |
| SS | System Status |
| SS | Special Service |
| SS | Suspended Solids |
| SS | Sandstorm (METAR weather) |
| SS | Signaling System (telecommunications) |
| SS | Semis (Latin: One Half) |
| SS | Sliding Scale |
| SS | Safety Systems |
| SS | Storage Server (for HPSS) |
| SS | Sea Salt |
| SS | Selective Service |
| SS | Spy Sweeper (Webroot) |
| SS | Sylvia Saint (adult film star) |
| SS | Special Studies |
| SS | Sega Saturn (game machine) |
| SS | Stack Segment |
| SS | Harry Potter and the Sorcerer's Stone (book by J. K. Rowling) |
| SS | Sworn Statement (Notary Public-Vital Statistics on certified copies of documents) |
| SS | Sa Sainteté (French: His/Her Holiness) |
| SS | Sjogren's Syndrome |
| SS | Stepside (type of truck bed) |
| SS | System Specification |
| SS | Super Sonic |
| SS | Surface to Surface |
| SS | Short Stature |
| SS | Serious Sam (game) |
| SS | Suicide Silence (band) |
| SS | Software Specification |
| SS | Spousal Support |
| SS | Stone Soup (comic) |
| SS | Summerslam (WWF Wrestling event held in August) |
| SS | Sewage Sludge |
| SS | Secular Society |
| SS | Shiv Sena (Indian political party) |
| SS | Sig Sauer (German pistol) |
| SS | Ski School |
| SS | Systemic Sclerosis |
| SS | Salmon Sperm (carrier DNA) |
| SS | Severus Snape (Harry Potter character) |
| SS | Suburban Service (Canadian post) |
| SS | Southshore (World of Warcraft gaming) |
| SS | Slim Shady (Eminem albumn) |
| SS | Source Selection |
| SS | Supplementary Services |
| SS | Soprano Saxophone |
| SS | Step-Son |
| SS | Sports Sedan (automobile) |
| SS | Side, Side (geometry) |
| SS | Senior School |
| SS | System Shock (computer game) |
| SS | Score Sheet |
| SS | Sua Santità (Italian: His Holiness) |
| SS | Site Safety |
| SS | Sure, Sure |
| SS | Slave Select (electronics) |
| SS | Samurai Sword |
| SS | Semisolid (pharmaceutics) |
| SS | Solid Snake (gaming, Metal Gear Solid character) |
| SS | Switching System |
| SS | Station Service (802.11 WLAN) |
| SS | Separate School (Toronto Catholic District School Board, Canada) |
| SS | Special Skill (Gunbound game) |
| SS | Strategic Sourcing |
| SS | Sezary Syndrome |
| SS | Session Service |
| SS | Start to Start |
| SS | System Summary |
| SS | Supply Support |
| SS | Shift Supervisor |
| SS | Self-Snoop (computing) |
| SS | Sea State |
| SS | Starsiege (Dynamix game) |
| SS | Sister Sledge (band) |
| SS | SpineShank (band) |
| SS | Shetland Sheepdog |
| SS | Sprint Spectrum (PCS) |
| SS | Secondary Storage |
| SS | Secret Squirrel (Hanna-Barbera cartoon) |
| SS | Service Sink (construction plans; plumbing) |
| SS | Super Small |
| SS | Souvenir Sheet (philately) |
| SS | Supraspinatus (muscle) |
| SS | Seventh Son (book) |
| SS | Standard Score |
| SS | Short Stuff |
| SS | Surface Search |
| SS | Supervisory System (SONET) |
| SS | Suicide Squad (Quake 3 clan) |
| SS | Slip Stitch (crochet) |
| SS | Suitable Substitute (US DoD) |
| SS | Signal Service (Great Britain, World War One branch of the Royal Engineers) |
| SS | Steyr Scout (Counter-Strike, gaming) |
| SS | Supervisory Skills |
| SS | Single Signal |
| SS | Stoomschip (Dutch) |
| SS | Stop State |
| SS | Sweet Surrender |
| SS | Ship Service |
| SS | Sub-Sonic |
| SS | Samurai Spirits (SNK video game) |
| SS | Status Signal |
| SS | Sinister Strike (gaming, World of Warcraft) |
| SS | Stockpile Stewardship |
| SS | Settleable Solids |
| SS | Support Strategy |
| SS | Slash's Snakepit (band) |
| SS | Sims Superstar (game) |
| SS | Systems and Structures |
| SS | Suction Side (of turbine/compressor blade) |
| SS | Sláturfélag Suðurlands (Icelandic farmers cooperative) |
| SS | Sell Stop (trading markets; stocks, bonds, commodities) |
| SS | Slick Shoes (band) |
| SS | Staff Specialist |
| SS | Stromile Swift (NBA Player) |
| SS | Sub Space (online game) |
| SS | Safety Stock (inventory control system) |
| SS | Sidewalk Slam (band) |
| SS | Shining Soul (game) |
| SS | Subsystem Specification |
| SS | System Supervisor |
| SS | Shortland Street (New Zealand TV soap opera) |
| SS | Strong Sad (cartoon character) |
| SS | Scout Sniper (USMC) |
| SS | Serta Sheep |
| SS | Satellite-Switched |
| SS | Super Shot |
| SS | Single Strength |
| SS | Sample Station |
| SS | Special Source |
| SS | Ship's Service |
| SS | Super Shadow (Sega Superstars character) |
| SS | Soulstone (gaming, World of Warcraft) |
| SS | Spike Spiegel (anime series Cowboy Bebop character) |
| SS | Street Sharks (cartoon) |
| SS | Skeptics Society |
| SS | Systems-of-Systems |
| SS | State Ship |
| SS | Super Scalar |
| SS | Storm Shield (Diablo 2 game) |
| SS | Simulator System |
| SS | Shadowstep (gaming, World of Warcraft) |
| SS | Shriek Show (DVD supplier) |
| SS | Saint Scholastica |
| SS | Secure Seal (anti-fraud technology used by banks) |
| SS | Selective Signaling |
| SS | Stock Summary (inventory) |
| SS | Service/Segment (Bellcore) |
| SS | Sourcing Specialist |
| SS | Segment Specification |
| SS | Section Secretary (Order of the Arrow, Boy Scouts of America) |
| SS | Sonic Shuffle (Sega game) |
| SS | Signal Simulator |
| SS | Surveillance Station |
| SS | Sire Summary |
| SS | Specific Specification |
| SS | Swing Space (Pentagon Renovation Project) |
| SS | Select Standby (RS-449) |
| SS | Starshell |
| SS | Staatsspoor (former railway station in The Hague) |
| SS | Systems Simulator |
| SS | Severn School (Severn High School) |
| SS | Submarine Qualified |
| SS | Stefano Silvestri (Italian Undersecretary of Defense) |
| SS | Shoulder Stretch (stretching exercises) |
| SS | SwiftSwitch (RuneScape toolkit) |
| SS | Success Sharing |
| SS | Savage Species (roleplaying games, Dungeons & Dragons) |
| SS | Saint Saiya (anime/Manga) |
| SS | Society of St. Sulpice (The Sulpicians; religious order) |
| SS | Security and Safeguards |
| SS | Skyshrine (Everquest, gaming) |
| SS | Stress-Susceptible (pig genetics) |
| SS | Scoville Scale (measure of chili hotness) |
| SS | Seismic Stability |
| SS | Submersible Ship (submarine) |
| SS | Stockpile Surveillance (US DOE) |
| SS | Summoned Skull (Yu-Gi-Oh! card) |
| SS | Scleral Spur (ophthalmology) |
| SS | Spacely Sprockets |
| SS | Shared Slot |
| SS | Star Syndicate (Newgrounds group) |
| SS | Slash Shot (Gunz the Duel videogame) |
| SS | Saradomin Sword (RuneScape; online game) |
| SS | Shelter Supervisor |
| SS | Shoulder Spica (cast) |
| SS | Subordinate System |
| SS | Serial Slayer |
| SS | Shift Superintendent |
| SS | Simplex Signaling |
| SS | Sakura Star (website) |
| SS | Stunt Squad |
| SS | Super Saiyan Saiyajin (Dragon World game) |
| SS | Synthetic Substitution |
| SS | Super Solenoid (anime; aka S2 or S^2) |
| SS | Storage to Storage Instruction |
| SS | Samurai Showdown/Samurai Spirits (SNK game) |
| SS | Systematic Sclerosis |
| SS | Sprite Show (webcomic) |
| SS | Superfund Surcharge |
| SS | Sector Suite (FAA positions at an ARTCC) |
| SS | Sistematico de Sangre (Spanish: Complete Blood Count) |
| SS | Suplex Slam (wrestling move) |
| SS | Sorry, Sloppy |
| SS | Sweep Select |
| SS | Stormwind Stockades (gaming, World of Warcraft) |
| SS | Scanner Subsystem |
| SS | Scribe Sheet |
| SS | Support System/Subsystem |
| SS | Spartan Sniper (FPS gaming) |
| SS | Stuffed Seconds (Cisco) |
| SS | Suspended Solid weight |
| SS | Steam Stat |
| SS | Sahel Solidarité (Burkina Faso) |
| SS | Stonnington Symphony (Melbourne, Australia) |
| SS | Soldier's System |
| SS | SlashStab (gaming clan) |
| SS | Source & Special Material |
| SS | Subnet Sweep |
| SS | SnarkStaff (gaming clan) |
| SS | Swallow Sidecars Ltd (eventually became Jaguar) |
| SS | Safety/Security Interface |
| SS | StaidSoft |
| SS | Switch and Signaling |
| SS | Simmer Stat |
| SS | Sólo Salas (Spanish) |