| Acronym | Definition |
|---|
| SSO➣Single Sign-On |
| SSO➣Star Stable Online |
| SSO➣Senior Sales Officer (various locations) |
| SSO➣Seguro Social Obligatorio (Spanish: Compulsory Social Security; various locations) |
| SSO➣Sanitary Sewer Overflow |
| SSO➣Ship Security Officer |
| SSO➣Single Sign on |
| SSO➣Software Storage Object |
| SSO➣Shared Storage Option |
| SSO➣Stateful Switch over |
| SSO➣Single Small Outline Package |
| SSO➣Server Side Object |
| SSO➣System Security Officer |
| SSO➣Singapore Symphony Orchestra |
| SSO➣Server-Side Object (computing) |
| SSO➣Social Security Office |
| SSO➣Supportive Services Only (various organizations) |
| SSO➣Standard Service Offer (energy) |
| SSO➣Syracuse Symphony Orchestra (Syracuse, New York) |
| SSO➣Society of Surgical Oncology |
| SSO➣Shared Storage Option (VERITAS Software Corporation) |
| SSO➣Sapporo Symphony Orchestra (Japan) |
| SSO➣Strategic Sealift Officer |
| SSO➣Shared Services and Outsourcing |
| SSO➣Social Search Optimization |
| SSO➣Sydney Symphony Orchestra |
| SSO➣Sun Synchronous Orbit |
| SSO➣Separate Sewer Overflow |
| SSO➣Standard-Setting Organization |
| SSO➣Sequence-Specific Oligonucleotide (Probes; genotyping) |
| SSO➣Simultaneous Switching Output |
| SSO➣Sales Service Order |
| SSO➣Supplementary Statement of Objections |
| SSO➣Senior Scientific Officer (UK) |
| SSO➣Sulfolobus Solfataricus |
| SSO➣Site Safety Officer |
| SSO➣Super Street Outlaw (car racing) |
| SSO➣School Support Organization |
| SSO➣Source Selection Official |
| SSO➣Stop Sex Offenders (child safety organization) |
| SSO➣Senior Staff Officer |
| SSO➣Social Security Organization (Laos) |
| SSO➣Students Speak Out (est. 2007) |
| SSO➣Site Security Officer |
| SSO➣Shared Service Organization |
| SSO➣Shattered Sun Offensive (gaming, World of Warcraft) |
| SSO➣Spanish Speaking Only |
| SSO➣Sarasota Sheriff's Office (FL) |
| SSO➣Stateful Switch Over (Cisco) |
| SSO➣Social Security Offset |
| SSO➣Space Shuttle Orbiter |
| SSO➣Sahara and Sahel Observatory |
| SSO➣Sandia Site Office |
| SSO➣Senior Station Officer (fire service; Australia and New Zealand) |
| SSO➣Super Secret Organization (Intel) |
| SSO➣Staff Security Officer (NSA) |
| SSO➣Specific Spoilage Organism (food protection) |
| SSO➣Safety/Security Officer |
| SSO➣Scleroderma Society of Ontario |
| SSO➣Spatial Standard Observer (aeronautics) |
| SSO➣Strawberry Song Orchestra (Japanese band) |
| SSO➣Satellite Switching Office |
| SSO➣Swing Shift Orchestra (Michigan) |
| SSO➣Südsüdost (German; South-South-East) |
| SSO➣Sud-Sud-Ovest (Italian: South-South-West) |
| SSO➣Ship Safety Officer |
| SSO➣Support Services Organization |
| SSO➣Space Systems Operations |
| SSO➣System Support Office |
| SSO➣Scottsdale Symphony Orchestra (Arizona) |
| SSO➣Survey Software Online (Addison, TX) |
| SSO➣Survivors Speak Out (UK support group for those who have attempted suicide) |
| SSO➣Sammamish Symphony Orchestra (Issaquah, WA) |
| SSO➣Switch Socket Outlet |
| SSO➣Studio Symphony Orchestra (Northern Ireland) |
| SSO➣Sheriff's Special Officer (Orange County, California) |
| SSO➣Single Second Order |
| SSO➣Special Security Office/r |
| SSO➣Sherman Symphony Orchestra (Sherman, TX) |
| SSO➣Starlight Symphony Orchestra (Texas) |
| SSO➣Sudano-Sahelian Office (UN) |
| SSO➣Secondary Significant Other (polyamory) |
| SSO➣Sorry Sold Out |
| SSO➣Same-Sex Oriented |
| SSO➣Synchronization Staff Officer |
| SSO➣Speech Service Option |
| SSO➣Suncoast Symphony Orchestra (Tampa Bay, FL) |
| SSO➣Support System for OEX (Orbital Experiments; NASA) |
| SSO➣System Synchronization Officer |
| SSO➣Soft Skill Optimierung |
| SSO➣Seaward Security Officer |
| SSO➣Swap Statement Operator |
| SSO➣Service Support Office |
| SSO➣Store Specific Order (retailing) |
| SSO➣Slight Show of Oil (drilling reports) |
| SSO➣System Support Organization |
| SSO➣Safety Services Officer |
| SSO➣Switch Specific Overhead |
| SSO➣Shadow Stalkers Organization |
| SSO➣Switching & Signaling Operations (Sprint) |
| SSO➣System Staff Officer |
| SSO➣Special Systems Operation |
| SSO➣Supply Support Operations |
| SSO➣System Security Office/Officer |
| SSO➣Scarborough Symphony Orchestra (UK) |
| SSO➣Saginaw Symphony Orchestra (Saginaw, Michigan) |
| SSO➣Signal Security Office/Officer |
| SSO➣Steady-State Optimization |
| SSO➣Surveillance Systems Operator |
| SSO➣Swiftwater Safety Operations |
| SSO➣System Supervisor Overview (training course segment) |
| SSO➣Special Support Office |