| Acronym | Definition |
|---|
| SPSO➣Scottish Public Services Ombudsman (UK) |
| SPSO➣Singapore Primary Science Olympiad (competition) |
| SPSO➣Senior Personnel Staff Officer (UK) |
| SPSO➣Supplier Process Sign-Off |
| SPSO➣Standard Particle Swarm Optimization |
| SPSO➣Science Processing Support Office (US NASA) |
| SPSO➣Southeastern Pennsylvania Symphony Orchestra (est. 1972) |
| SPSO➣Strathfield Planning Scheme Ordinance (zoning; Australia) |
| SPSO➣State Programme Support Office (USAID) |
| SPSO➣Simple Package Saw Oscillator (Epson) |