| 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 |