| Acronym | Definition |
|---|
| SOS | MAYDAY (logging abbreviation) |
| SOS | Sibling Over Shoulder (chat) |
| SOS | [not an acronym] a common misconception is that SOS means Save Our Ship/Souls (a distress call); the letters don't actually stand for anything |
| SOS | Secretary Of State |
| SOS | Somali Shilling (ISO currency code) |
| SOS | Socialstyrelsen (Sweden: national board of health and welfare) |
| SOS | Sound On Sound |
| SOS | Share Our Strength |
| SOS | Strength of Schedule (sports statistic) |
| SOS | Speed of Sound |
| SOS | System Of Systems |
| SOS | Save Our Souls |
| SOS | Sink or Swim (Super Nintendo video game) |
| SOS | Son of Sevenless (enzyme involved in the signal transduction pathway) |
| SOS | Silicon On Sapphire |
| SOS | Survivors of Suicide |
| SOS | Secular Organizations for Sobriety (Council for Secular Humanism) |
| SOS | Street Outreach Services (San Francisco Community Clinic Consortium) |
| SOS | Save Our Selves |
| SOS | Spørgsmål Og Svar (Danish) |
| SOS | Special Operations Squadron |
| SOS | Save Our Wild Salmon |
| SOS | Save Outdoor Sculpture |
| SOS | Source Of Supply |
| SOS | Same Old Song |
| SOS | Structural Operational Semantics (computer science) |
| SOS | Same Old Story |
| SOS | Sygate Online Services |
| SOS | Scope of Services |
| SOS | Science of Spirituality |
| SOS | Save Our Ship (distress call, common but incorrect) |
| SOS | Summer of Service |
| SOS | Same Old Stuff (polite form) |
| SOS | Sounds of Silence |
| SOS | Stuck On Stupid |
| SOS | Society of Stranders (shag/beach dancing group; Grand Strand, South Carolina) |
| SOS | Swedish Obese Subjects (study) |
| SOS | Shoot on Sight |
| SOS | Summer of Sam (movie) |
| SOS | Snowboard Outreach Society (Avon, Colorado, USA) |
| SOS | Services Of Supply (WWII) |
| SOS | Son of Sam |
| SOS | Southern Oxidants Study (North Carolina State University) |
| SOS | Stop OverSpending |
| SOS | Save Our School |
| SOS | Second Order Statistics |
| SOS | Shoot on Sight (gaming clan) |
| SOS | Sophisticated Operating System (Apple /// OS) |
| SOS | Squadron Officer School (USAF) |
| SOS | Same 'ol Situation |
| SOS | Society of Singers |
| SOS | Save Our Society |
| SOS | Save Our Sailors (Sailor Moon anime) |
| SOS | Strawberry on the Shortcake |
| SOS | Son of Satan |
| SOS | Samaritans of Singapore |
| SOS | Students for An Orwellian Society |
| SoS | System-of-System |
| SOS | Service on Site |
| SOS | Sex on Stage (band) |
| SOS | Science of Survival |
| SOS | Sons of Satan |
| SOS | Spawn of Satan |
| SOS | Share Operating System |
| SOS | Shot on Sight (band) |
| SOS | Software Operating System |
| SOS | Save Our Sons |
| SOS | Statement Of Service |
| SOS | Sign of Strength (Wyckoff trading theory) |
| SOS | Stamp Out Smoking |
| SOS | Sons of Silence (Motorcycle Club) |
| SOS | Speed Of Service |
| SOS | Save Our Shows (TV Guide) |
| SOS | Son of Stopgap |
| SOS | Struck Off Strength |
| SOS | Save Our Sonics (organization that tried to keep the Seattle Supersonics from leaving town) |
| SOS | Storm of Swords (George RR Martin book) |
| SOS | Save Our Skins (Cincinnati, OH) |
| SOS | Symbian Operating System |
| SOS | Skydivers Over Sixty (social club) |
| SOS | Special Operations School |
| SOS | Survival Optics Sunglasses |
| SOS | Swamp of Sorrows (gaming, World of Warcraft) |
| SOS | Science of Speed |
| SOS | Sending Out Signals (album by group Garrison) |
| SOS | Si Opus Sit (Latin: If Necessary; a prescription indication usually implies the drug is to be administered only once) |
| SOS | Support Operating System |
| SOS | Sultan Of Swat (Babe Ruth) |
| SOS | Same Old Situation (Mötley Crüe song) |
| SOS | Self Opening Square (paper bag) |
| SOS | Service Oriented Software |
| SOS | Statement of Sensitivity |
| SOS | Some One Special (chat) |
| SOS | Shoot on Site |
| SOS | Shakespeare Oxford Society (Yorktown Heights, NY) |
| SOS | Sons Of Stalin (Quake gaming clan) |
| SOS | Save Our Saucepans |
| SOS | Sons of Samoa (gang) |
| SOS | Symbolic Operating System |
| SOS | Source Off-Site |
| SOS | Sum-Of-Sinusoids |
| SOS | Student Online Support |
| SOS | Scope of Supply |
| SOS | Supervisor of Shipbuilding |
| SOS | Salsa on Sundays |
| SoS | Sea of Solutions (Vlaardingen, The Netherlands) |
| SOS | Supply Our Students (Sioux Falls, SD) |
| SOS | Smör Ost Och Sill (Butter, Cheese and Herring) |
| SOS | Save Our Service (Scotland) |
| SOS | Son of Superman |
| SOS | Song of Solomon/Song of Songs |
| SOS | Stragglers Orienteering Society (UK) |
| SOS | Stuff On a Shingle (polite form; common military chow hall meal; meat/cream sauce served on toast) |
| SoS | Sword of Skardsen (Neopets) |
| SOS | Sick of School |
| SOS | Sub Ocean Safety (medical rescue of underwater divers) |
| SOS | Security Overseas Seminar |
| SOS | Scope of Studies |
| SOS | Spectrally Optimized Smart (Camera) |
| SOS | Someone Over Shoulder (chat) |
| SOS | Standing Order Service |
| SOS | Skits Outreach Services (theatre troupe) |
| SOS | System Operation Status (Sprint) |
| SOS | Syndicated Office Systems |
| SOS | State Operated Schools |
| SOS | Student Outcome Survey |
| SOS | Save Our Shoes (Santa Cruz, CA) |
| SOS | Simple Office Solutions (Santa Rosa, CA) |
| SOS | Solar Optical Telescope |
| SOS | Soap on Steel (SOS Pads) |
| SOS | Surveillance of Space |
| SOS | Student Organization Support |
| SOS | Ski or Snowboard Club (UC Davis) |
| SOS | Save Our Shoreline, Inc. (Michigan) |
| SOS | Strategic Options Study (India) |
| SOS | Student Ombuds Service |
| SOS | Skagway Outlet Store |
| SOS | Sarcoidosis Online Sites |
| SOS | Standards & Open Systems |
| SOS | Save Our Survivors |
| SOS | Sacramento Orchid Society (California) |
| SOS | Secure Object Store (Lotus Notes database system) |
| SOS | Sumatra Orangutan Society |
| SOS | Save Often Stupid |
| SOS | Sack Of Stuff (polite form) |
| SOS | Speech Option Selection |
| SOS | Save Our Savannah |
| SOS | Special Order Sale |
| SOS | Slop on a Shingle (chipped beef on toast; polite form) |
| SOS | Senior Operations Specialist |
| SOS | Story of Sadness (song) |
| SOS | Save Our School, Share Our Shores (Ontonagon County, Michigan) |
| SOS | Stars Organisation for Spastics |
| SOS | Send Out Service |
| SOS | Space Operations Simulator |
| SOS | Scoot Over Some |
| SOS | Sarasota Orchid Society (Florida) |
| SOS | Surveillance Operating System (Hekimian) |
| SOS | Strategic Operating System |
| SOS | Sea of Slime (publication) |
| SoS | Staff of Shielding (Everquest) |
| SoS | Speed of the Shissar (Everquest) |
| SOS | Start of Shipments |
| SOS | Strahl-On-Strahl |
| SOS | Seek Our Savior |
| SOS | Soldiers of Satin (gaming clan) |
| SOS | Singapore Organisation of Seaman |
| SOS | Start Out/Off Slow (driver's education) |
| SOS | Southern Ohio Sanitation, LLC |
| SOS | Society of Separationists, Inc. |
| SOS | Share of Shelf |
| SOS | Sensitizing Operation Sequence |
| SOS | Subscriber and Operator Services |
| SOS | Sandia Office Supply |
| SOS | Save Our Submarine |
| SOS | Sink or Swing (band) |
| SOS | Signals Of Silence (band) |
| SOS | Spirit of Selling GmbH (Hamburg, Germany) |
| SOS | Split Option Soldier |
| SOS | Sprint Office Support (Sprint) |
| SOS | Supportability Online System |
| SOS | System Operational Specification |
| SOS | Significant Other Strike |
| SOS | Special Operator Service Traffic |
| SOS | SPRINT Operations Shelter |
| SOS | Save or Sacrifice (bridge game) |
| SOS | Straight Off da Street |
| SoS | Servants of Shade (Halo gaming clan) |
| SOS | Son of Stick (fishing) |
| SOS | Strategic Office Support |
| SOS | Supplementary Ophthalmic Service |
| SOS | Situation Objective Strategy |
| SOS | Semantics, Opinion and Sentiment in Text (summer school) |