Satellite Positioning and Tracking 
Shared Product Object Tree 
Smart Personal Objects Technology 
Systeme Pour l'Observation de la Terre 
Satellite Pour l'Observation de la Ter… 
Secondary-location Point of Terminatio… 
Sequential Proxy Optimization Techniqu… 
Single Payment Options Trading 
Smart Personal Object Technology 
Speed Position and Track 
Spot Wind 
Synchronized Predeployment and Operati… 
PANAMSAT CORP. 
SIRTF Planning Observations Tool 
Small Payload Orbit Transfer Vehicle 
Small Portable Operation Terminal 
Smithsonian Precision Optical Tracking 
Sociedad Puertorriqueña de Ortopedia y… 
Solar Polar Orbit Traveller 
Special Purpose Operational Training 
Spitzer Planning Observations Tool 
Spot Meter 
Stanford Pre Orientation Trips 
Systeme Pour d'Observation de la Terre 
Systeme Probatoire d'Observation de la… 
Systeme Probatoire pour l'Observation… 
Strengthen Photonics and Optical Techn…