SPN
- CD43
- Kerberos protocol
- Nunavik Police Service
- Saipan International Airport
- Sanapaná language
- Savanna Pastoral Neolithic
- Scientific pitch notation
- Serbia Against Violence (coalition)
- Shahjahanpur railway station
- Shortest job next
- Solitary pulmonary nodule
- Sp!n
- Sp(n)
- Spooner Row railway station
- State Policy Network
- Substitution–permutation network
- Supernatural (American TV series)