RACE		Radio Amateur Club de l'Espace
RADCAT		RADar CAlibration Target
RADIAC		RadioActivity Detection Identification and Computation
RADOP		RADar / OPtical
RADOSE		RAdiation DOSimeter Experiment
RADSAT		RADiation SATellite
RAE		Radio Astronomy Explorer
RAIR		Ram Augmented Interestellar Rocket
RAL		Rutherford Appleton Laboratory
RAMBO		RAM Burn Observation
RAMPART		Radar Advan.Measurem.Program Analisys of Re-entry Techniques
RAND		Research ANd Development
RBV		Return-Beam Vidicon
RBVMCS		Return Beam Vidicon Multispectral Camera System
RC		Reentry Communications
RCA		Radio Corporation of America
RCM		Radar Counter-Measures
RCS		Reaction Control System
RCSM		Reaction Control Subsystem Module
RD		Reaktivni Dvigatel
RDM		Research Double Module
RDT&E		Research, Development, Test and Evaluation
REP		Radar Evaluation Pod
RESIC		Remote Earth Sensing Information Center
REXS		Radio EXploration Satellite
RFNA		Red Fuming Nitric Acid
RGA		Rate Gyro Assembly
RISP		Recoverable Interplanetary Space Probe
RKA		Rossiyskoye Kosmicheskoye Agenstvo
RL		Rocket Launcher
RM		Radiation Meteroid
RMS		Remote Manipulator System
ROCSAT		Republic Of China SATellite
ROSEAU		Radio Observation par Satellite Excentrique à Automatisme Unique
ROTHR		Relocatable Over-The-Horizon Radar
RP		Rocket Propellant
RPA		Retarding Potential Analizer
RS		Radiation in Spacecraft
RTG		Radioisotopic Thermal Generador
RTS		Remote Tracking Station
RZGEB		Radiation and Zero-G Effects on Blood