| Sponsored Programs Information Network | Business |
| Situation Problem Implication And Need | Business |
| Supply Partner Information Network | Business |
| Substances in Products in the Nordic | Business |
| Special Parent Information Network | Community |
| Supporting People In Need | Community |
| Serving People In Natomas | Community |
| Strategic Progressive Information Network | Community |
| Strategic Press Information Network | Community |
| Simple Promela Interpreter | Computing |
| Snap-in Provided Information | Computing |
| Sensor Positioning and Identification Network | Computing |
| Searchable Physics Information Notices | Computing |
| Strategies and Policies for Informatics | Computing |
| Secure Personal Identification Number | Computing |
| Spintop | Cryptocurrency |
| Spinada.cash | Cryptocurrency |
| Senate Planetary Intelligence Network | General |
| Segmented Polycephalous Integrated Networks | General |
| See Positive Instead Of Negative | General |
| Stay Positive Ignore Negatives | General |
| Select Professional Industry Night | General |
| Smart Pretty Interesting Nice | General |
| Spinning® Program Instructor Network | General |
| Situation Problem Implication Need | General |
| Serving People in Need | General |
| Sixth Point Interest Network | General |
| Sound Painting Improvisers Nice | General |
| Senior Planning Industry Network | Governmental |
| SPecial INvestigation | Governmental |
| Service Provider Information Network | Internet |
| Sandwell Public Information | Medical |
| Social Phobia Inventory | Medical |
| Speech Perception In Noise | Medical |
| Special Pet In Need | Medical |
| Special Instructions | Military and Defence |
| Inapari, Peru | Regional |
| Software Process Improvement Network | Softwares |
| Safe Pedaling In Nevada | Sports |
| Service Provider Identification Number | Telecommunication |
