Sorenson 
Specific Operational Requirement 
Stable Orbit Rendezvous 
Statement of Requirement 
Specification Operational Requirement 
Starfire Optical Range 
Start of Record 
Statement of Requirements 
ScoutORama 
Special Operating Requirements 
specific orders and requests 
Successive Over Relaxation 
Support of Optimal Routing 
System of Record 
Safety Observation Reporting 
Sale or Return 
Sales Order Request 
Schedule of Requirements 
Section Operating Report 
serum opacity reaction 
service order request 
Set-On Receiver 
sham-operated rats 
Shut-Off Rod 
smallest overlapping region 
Society for Occupational Research 
Society of Rheology 
Society of Roadcraft 
Sonair Servico Aereo 
sorbitol