| Acronym | Definition |
|---|
| PLSO➣Professional Land Surveyors of Oregon |
| PLSO➣Partial Lump Sum Option (retirement plan) |
| PLSO➣Professional Land Surveyors of Ohio (Dublin, OH) |
| PLSO➣Parker Library Steward Observatory (University of Arizona) |
| PLSO➣Post Launch Support Office (European Space Agency) |
| PLSO➣Public Land Survey Office (Washington State Department of Natural Resources) |
| PLSO➣Phonetic Letter Spell Out |