Social Security Number 
Stream Sequence Number 
Space Surveillance Network 
Station Serial Number 
Subsystem Number 
Shuttle Support Node 
Switched Service Network 
Attack Submarine 
Server Sequence Number 
Social Security Numbers 
South South North 
Specification Serial Number 
Station Sequence Number 
Sub-System Number 
Airquarius Air Charter 
IATA code for Seoul Ab, Seoul, South K… 
Nuclear Submarine 
Nuclear-Powered Attack Submarine 
secure supercomputing networking 
See-saw nystagmus 
Segment Stack Number 
sensory neuronopathy 
sensory neuropathy 
Servizio Sanitario Nazionale 
Severely subnormal 
shape-stable nosetip 
sickness nephritis 
Sintered Silicon Nitride 
Sistem Standardisasi Nasional 
Social Safety Nets