PIID
| Acronym | Definition |
|---|---|
| PIID | Parent Instance Identifier |
| PIID | Publishers' International ISBN Directory |
| PIID | Procurement Instrument Identifier (US DoD) |
| PIID | Philippine Institute of Interior Designers |
| PIID | Practice Implementation Indicator Description (CMMI assessment) |
| PIID | Peripheral Intermittent Intravenous Device |
| PIID | Piecewise Independent and Identically Distributed |