| Acronym | Definition |
|---|
| SLO | San Luis Obispo (California) |
| SLO | Slovenia (ISO Country Identifier) |
| SLO | Student Learning Outcome |
| SLO | Stichting Leerplanontwikkeling (Netherlands) |
| SLO | Slovak/Slovenian (language) |
| SLO | School Liaison Officer |
| SLO | Service Level Objectives (information technology services) |
| SLO | System Landscape Optimization (SAP AG) |
| SLO | Salem, Illinois (Airport Code) |
| SLO | State Library of Ohio (Columbus, OH) |
| SLO | Salon du Livre de l'Outaouais (French: Outaouais Book Fair; Canada) |
| SLO | Student Life Organization (Frankfurt, Germany) |
| SLO | Student Liaison Officer (various universities; UK) |
| SLO | Singapore Lyric Opera (Singapore; est. 1990) |
| SLO | Special Liquor Order (Pennsylvania Liquor Control Board) |
| SLO | Senior Liaison Officer |
| SLO | space liaison officer (US DoD) |
| SLO | Slow Above |
| SLO | Société Limousine d'Odonatologie (French: Limousin Society of Odanatology) |
| SLO | Strictly Localized Orbital |
| SLO | Scholarships Liaison Officer |
| SLO | Suspension Lockout System |
| SLO | Société Luxembourgeoise d'Oncologie (French: Luxembourg Society of Oncology) |
| SLO | Significant Learning Opportunity (euphemism) |
| SLO | Shared Learning Outcomes |
| SLO | Submarine Liaison Officer |
| SLO | Subject Line Only (e-mail) |
| SLO | Single Line Only |
| SLO | Spanish Language Outreach (program) |
| SLO | Service Learning Office (various schools) |
| SLO | Scanning Laser Ophthalmoscope (eye examination tool) |