Really Simple Syndication 
Rotating Service Structure 
Roll Stability Support 
Range Safety System 
root-sum-square 
Remote Switching Systems 
Reaction System Support 
Regional Subscription System 
Road Sensing Suspension 
Radio Science Subsystem 
Regional Spatial Strategy 
Remote Switching System 
root-sum-squared 
Reactants Supply System 
reactor safety study 
Reactor shutdown system 
Ready Service Spares 
Regional Spatial Strategies 
Regularly Scheduled Series 
Regulary Scheduled Series 
Remote Sensing Systems 
Rosette Scan Seeker 
Range Safety Switch 
RDF Site Summary 
recombination signal sequence 
recombination signal sequences 
Regional Services Staff 
Rehabilitation Support Services 
Remote Sensing Science 
remote sensors subsystem