| Shared Processing Network | Academic & Science |
| Social Psychology Network | Academic & Science |
| Portuguese Neurological Society | Academic & Science |
| Sociedade Portuguesa de Neurologia | Academic & Science |
| Secure Payment Network | Accounts and Finance |
| Saipan | Airport Code |
| Security Pennsylvania Financial Corporation | Business |
| SP Ausnet | Business |
| Specific Procurement Notice | Business |
| Shipment Performance Notice | Business |
| Simple Purchasing Network | Business |
| Superior Energy Services, Inc. | Business |
| Society of Pediatric Nurses | Business |
| Silicon Prairie News | Community |
| Saint Petersburg News | Community |
| State Policy Network | Community |
| Synergy Park North | Community |
| Schools Prayer Network | Community |
| Separation Program Number | Computing |
| Source Port Number | Computing |
| Service Principal Name | Computing |
| Sony Pictures Network | Computing |
| Symantec Protection Network | Computing |
| Substitution Permutation Network | Computing |
| Subscriber Premises Network | Computing |
| Software Preservation Network | Computing |
| Signal Processor Network | Electronics |
| Sequential Phase Number | Electronics |
| Shift Pulse Network | Electronics |
| Single Pole Network | Electronics |
| Spare Part Number | Electronics |
| Switch Panel Network | Electronics |
| Signal Plus Noise | Electronics |
| Services Professionals Network | General |
| Sustainable Poultry Network | General |
| Sensor Pattern Noise | General |
| Special Permission Numbers | General |
| Secondary Privacy Number | General |
| Spindle Knuckle | General |
| Scientific Pitch Notation | General |
| Suspect Parameter Number | General |
| Spinner | General |
| Spring Pin | General |
| Soul Power Nutrition | General |
| Scottish Photography Network | General |
| Stochastic Petri Net | General |
| Sustainability Practice Network | General |
| Simply Pure Nutrients | General |
| Surat Perbendaharaan Negara | General |
| Service Provider Network | General |
| Service Provider Name | General |
| Springfield Parents Network | General |
| Stimulus Preceding Negativity | General |
| Shear Plane Normal | General |
| S For Private Network | General |
| Simple Provider Node | General |
| Sitecore Partner Network | General |
| Sustainability Professionals Network | General |
| Sistem Pendidikan Negara | General |
| Small Private Network | General |
| Successful Practices Network | General |
| Supernatural Putin Nevada | General |
| Sponsor Program Notice | Governmental |
| Special Paper Number | Governmental |
| System Person Number | Governmental |
| SHAHJEHANPUR | Indian Railway Station |
| Supernatural | Internet |
| Simplest Possible Number | Maths |
| Student Practical Nurse | Medical |
| Students for Professional Nursing | Medical |
| Solitary Pulmonary Nodule | Medical |
| Special Program Number | Military and Defence |
| Sponsor Program Number | Military and Defence |
| Security Publication Number | Military and Defence |
| Secretarido Da Propaganda Nacional ( Portugal) | Military and Defence |
| Separation Program Numbers | Military and Defence |
| Service Principal Names | Networking |
| Secure Private Network | Networking |
| Saipan International Airport, Saipan, Mariana Islands | Regional |
| Software Project Notebook | Softwares |
| Shuttle Project Notice (ksc) | Space Science |
| Standard Precision Navigator | Space Science |
| Sports Promotion Network | Sports |
| Service Panel Number | Telecommunication |
