Reaction Control System 
Royal Commonwealth Society 
Radar Cross Section 
reactor coolant system 
Reaction Control Subsystem 
Reaction Control Systems 
Remote Control System 
Report Control Symbol 
Requirements Computation System 
Radio communications system 
Reaction and Control System 
Reentry Control System 
Reports control system 
Reserve Components 
Resource Control System 
Reuter centrifugal sampler 
Revision Control System 
Radio Communication System 
Radio Communications Service 
Radio Conference Subcommittee 
Radio Corporation of Singapore 
Regional Coordination Service 
Reloadable Control Storage 
Reports Control Symbol 
Republican Clubs 
Requirements Control Symbol 
Residential Care Subsidy 
Royal College of Science 
Royal College of Surgeons 
rabbit aorta contracting substance