English abbreviations from rap to ras
- RAP (Regimental Aid Post [1])
- RAPD (Relative afferent pupillary defect)
- RAPDF (Residue-specific all-Atom conditional Probability Discriminatory Function)
- RAPE (Re Analyzing Popular Entertainment)
- RAPI (Reactive Armour Protection)
- RAPID (Revitalise Areas Of Planning Investment And Development)
- RAPIDE (Re-locatable Army Processors for Intelligence Data-Europe)
- RAPIDSIM (Rapid Intertheater Deployment Simulation Model)
- RAPMA (R.A. Pandey Maritime Academy (India))
- RAPOE (Regional APOE)
- RAPS (Remote Area Power Supply)
- RAPT (Retractable Amphibious Pontoon Technology)
- RAPTOR (Rapid Telescopes for Optical Response project)
- RAR (Rarotonga International Airport)
- RARA (Reno Air Racing Association)
- RARDE (Royal Armament Research and Development Establishment (UK))
- RARE (Rapid Acquisition with Relaxation Enhancement (MRI technique))
- RARP (Reverse Address Resolution Protocol)
- RARS (Reusable ADA Repository System)
- RAS (Regional Affairs Strategist)