Resource Description Framework 
Radio Direction Finding 
Rate Decrease Factor 
Rapid Deployment Force 
radial distribution function 
Radio Direction Finder 
Refuse Derived Fuel 
Resource Data File 
Resource Description Format 
Radar Direction Finder 
Radio Direction Finder/Finding 
Rapid Deployment Forces 
Record Definition Field 
Records Digitization Facility 
Reverse Domain Filling 
Rich Data File 
Radial Dielectric Function 
radial distribution functions 
Radio Detection Finding 
Radiochemical Development Facility 
rat dermal fibroblasts 
Rationalized Data File 
Real Data Fine 
Real-data forecast 
Reality Distortion Field 
recombination directionality factor 
Refuse Derive Fuel 
Refuse-Derived Fuel 
Remote Delivery Facility 
Remote Distribution Frame