PISO
| Acronym | Definition |
|---|---|
| PISO | Parallel In, Serial Out |
| PISO | Process Improvement for Strategic Objectives (University of Sunderland) |
| PISO | Philippine Internet Services Organization |
| PISO | Parallel Input Serial Output |
| PISO | Pacific Islands Support Office (US NPS; Honolulu, HI) |
| PISO | Pressure-Implicit Split-Operator (computational fluid dynamics) |