| Acronym | Definition |
|---|
| PIN | Personal Identification Number |
| PIN | People in Need |
| PIN | Pressure In |
| PIN | Pain In the Ass (Nursing) |
| PIN | Pinion |
| PIN | Position Indicator |
| PIN | Places in the Network (computer architecture) |
| PIN | Power in Numbers |
| PIN | Partners in Learning |
| PIN | Product Identification Number |
| PIN | Pekan Imunisasi Nasional (Indoensian: National Immunization Week) |
| PIN | Public Information Notice (International Monetary Fund) |
| PIN | Persönliche Identifikations Nummer (German: Personal Identification Number) |
| PIN | Protein Interaction Network |
| PIN | Projecten in Nederland (Dutch: Projects in Netherlands) |
| PIN | Prostatic Intraepithelial Neoplasia |
| PIN | Public Insight Network (various organizations) |
| PIN | Primate Info Net (University of Wisconsin) |
| PIN | Personal Information Number |
| PIN | Provider Identification Number |
| PIN | Personal Internet Name |
| PIN | Personal Information Navigator |
| PIN | Procedure Interpreter |
| PIN | Procedure Interrupt Negative |
| PIN | Project Idea Note (World Bank) |
| PIN | Protein Inhibitor of Neuronal Nitric Oxide Synthase |
| PIN | Prior Information Notice |
| PIN | Property Index Number |
| PIN | Process Identification Number |
| PIN | Power Information Network |
| PIN | Positive-Intrinsic-Negative |
| PIN | Posterior Interosseous Nerve |
| PIN | Pesticide Information Network |
| PIN | Public Involvement Network (various organizations) |
| PIN | People's Information Network (UK) |
| PIN | Progressive Inflammatory Neuropathy |
| PIN | Postal Index Number (India) |
| PIN | Product Information Network |
| PIN | National Integration Party (Costa Rica) |
| PIN | Particle Impact Noise |
| PIN | Project Identification Number |
| PIN | Police Information Network |
| PIN | Part or Identifying Number |
| PIN | Processor Independent NetWare (Novell) |
| PIN | Pregnancy, Infection and Nutrition |
| PIN | Program Item Number |
| PIN | Program Information Notice |
| PIN | Plan Identification Number |
| PIN | Product Information Number |
| PIN | Petroenergy Information Network (Iran) |
| PIN | Promontory Interfinancial Network |
| PIN | Password Identification Number |
| PIN | Position Identification Number |
| PIN | Production Identification Number |
| PIN | Pre-Invitation Notice |
| PIN | Personnel Increment Number |
| PIN | Procurement Information Notice |
| PIN | Procurement Identification Number |
| PIN | Pajama Income Network |
| PIN | Procedural Interrupt Negative (ITU-T) |
| PIN | Progressive Iowa Network |
| PIN | Photo Intrinsic |
| PIN | Publication Identification Number |
| PIN | Packet Identification Number |
| PIN | Pinpoint Identified Neighborhoods |
| PIN | Personnel Item Number |
| PIN | Parent Is Near |
| PIN | Procurement Installation Number |
| PIN | Project Initiation Note |
| PIN | Product Improvement Notice |
| PIN | Plan Idroloxico Nazional |
| PIN | Postal Information Number |
| PIN | Physical Inventory Notification |
| PIN | Primary Inter-LATA Number (Sprint) |
| PIN | PN Junction with Isolation Region |