| Abbreviation | Definition |
|---|---|
| PHSA | Public Health Services Act |
| PHSAct | Public Health Service Act of 1944 |
| PI | Participating Informant |
| PI | Paternity Index |
| PI | Permanently Identified |
| PI | Post Institutionalized |
| PI | Public Intoxication |
| PIA | Parole In Absentia |
| PIA | Proprietary Information Agreement |
| PIC | Partner In Crime |
| PIC | Personal Injury Collision |
| PIC | Pre-Inquiry Change |
| PIC | Prior Informed Consent |
| PICC | Philadelphia Industrial Correctional Center |
| PID | Personal Identification Number |
| PID | Personal Injury Defense |
| PID | Proprietary Information Disclosure |
| PIG | Persuasion Is Good |
| PIG | Pride, Integrity, Guts |
| PIG | Protection Interface Grants |