sort by Rank | Alpha
| Possible Meanings | Rank |
| Person in Need of Supervision | *** |
| Public Interest Network Services | *** |
| Primary Interactive Network Sites | *** |
| People in Need of Supervision | *** |
| Pain Intensity Number Scale | ** |
| Prostate Interventional Nutrition Study | ** |
| Processing in Network Storage | ** |
| Professional Iranian Networking Society | ** |
| Pelvic Instability Network Support | ** |
| Pupil Inclusion Network Scotland | ** |
| Polarized Inelastic Neutron Scattering | ** |
| Progressive Inhibition of Neuromuscular Structures | ** |
| Project Information and Navigation System | ** |
| Parent Information Network Specialists | ** |
| Pipeline Inspection Notification System | ** |
| Pakistan Inst of Nuclear Science | ** |
| Personal Interface for Navigational Systems | ** |
| Program for Internet News | ** |
| Primary Interactive Network Site | * |
| Pan Information and Networking Services | * |
| Philippine Information Network Services | * |
| Pernec Integrated Network Systems | * |
| Persons in Need of Supervison | * |
| Police Information Network for Scotland | * |
| Precision Integrated Navigation System | * |
| Persons in Need of Supervision | * |