| Abbreviation | Definition |
|---|---|
| PI | Permanently Identified |
| PI | Post Institutionalized |
| PI | Presumption of Innocence |
| PI | Public Intoxication |
| PIA | Parole In Absentia |
| PIA | Proprietary Information Agreement |
| PIBL | Pilipinx In Business and Law |
| PIC | Partner In Crime |
| PIC | Partners In Crime |
| PIC | Personal Injury Collision |
| PIC | Pre-Inquiry Change |
| PIC | Prior Informed Consent |
| PIC | Prison Industrial Complex |
| PICC | Philadelphia Industrial Correctional Center |
| PID | Personal Identification Number |
| PID | Personal Injury Defense |
| PID | Proprietary Information Disclosure |
| PIE | Paedophile Information Exchange |
| PIG | Persuasion Is Good |
| PIG | Pride, Integrity, Guts |