Ready Reserve Force
Rapid Reaction Force
Ready Reaction Force
Ready Reserve Fleet
ragged red fiber
Rapid Reaction Forces
relative response factor
residual renal function
Ribosome recycling factor
Radio Reconnaissance Flight
Radio-Related Functions
ragged red fibres
ragged-red fibers
Raptor Research Foundation
Real Register File
Recipient Resource File
Regional Research Funds
regional response force
Reiner-Rivlin Fluid
relative renal function
Reliability Review Forum
renal retention function
Research and Restricted Funds
Research Reactor Facility
Reserve Response Force
Reservoir Recovery Forum
Resonant Ring Filter
restoring factor
Retail Research Foundation
Retention Recommendation Form
retinal relaxing factor
Retro-Rocket Fire
retrorubral field
ribosome-releasing factor
rigid rectus femoris
Risk Reduction Factor
Room Reservation Form
Royal Air Force
Recupero e Riabilitazione Funzionale
Recupero e Rieducazione Funzionale