Routing Information Protocol 
Raster Image Processor 
Ripley 
Router Information Protocol 
Routing Internet Protocol 
RCRA Implementation Plan 
Receiving inspection plan 
Rapid Isothermal Processing 
Recognition Improvement Program 
Refractive Index Profile 
Regional Indicative Programme 
register of intelligence publications 
Reliability Improvement Program 
Relief in Place 
Remote Imaging Protocol 
research in progress 
Rest In Peace 
ribosome-inactivating protein 
Road Inventory Program 
Radar Improvement Plan 
Radar Instrument Panel 
radiocaesium interception potential 
radioimmune precipitation 
radioimmunoprecipitation 
Railtrack Investment Panel 
raised intracranial pressure 
Ranger Indoctrination Program 
raphe interpositus 
rapid information processing 
rapid information processing task