| R&A | Refrigerator & Air-conditioner 
| Others |
| R&A | Reliability and Availability
| Others |
| R&A | Repair and Alteration
| Others |
| R&A | Review and Analysis
| Others |
| R/A | Radar Altimeter
| Others |
| R/A | Return Air
| Others |
| RA | Military Serial Number prefix for non-drafted Volunteer
| Others |
| RA | R Also
| Others |
| RA | Race Altered
| Others |
| RA | Radhiallahtala And
| Others |
| RA | Radial Artery
| Others |
| RA | Radiallhu Anhu
| Others |
| RA | Radio Activity
| Others |
| RA | radioactive
| Others |
| RA | radioassay
| Others |
| RA | Radiographic Absorptiometry
| Others |
| RA | Radionuclide Angiography
| Others |
| RA | Radium
| Element |
| RA | Radium A
| Others |
| RA | Ragweed Antigen
| Others |
| RA | Rahman Arrahman
| Others |
| RA | Railers Anonomous
| Others |
| RA | Rainbow Alliance
| Others |
| RA | RainForest Alliance
| Others |
| RA | Raistlin's Apprentices
| Others |
| RA | Raistlins Apprentice
| Others |
| RA | Raja Aka
| Others |
| RA | Raja arrived
| Others |
| RA | Rally America
| Others |
| RA | Rally Applicant
| Others |
| RA | Ramboldi Addicts
| Others |
| RA | Random Adventure
| Others |
| RA | Random Amplitude
| Others |
| RA | Random Average
| Others |
| RA | Range Area
| Others |
| RA | Rapid Access
| Others |
| RA | Ravenna (Provence)
| Others |
| RA | Raymond Alexander
| Others |
| RA | RCA Corporation
| Others |
| RA | Read Aloud
| Others |
| RA | Reader Average
| Others |
| RA | Reader's Anonymous
| Others |
| RA | Reading Ability
| Others |
| RA | Reading Age
| Others |
| RA | Reading Alarm
| Others |
| RA | Reading Assignment
| Others |
| RA | Real Annoyin
| Others |
| RA | Real Audio
| Others |
| RA | RealAudio Audio file
| Others |
| RA | Really Annoying
| Others |
| RA | Really Artistic
| Others |
| RA | Really Awesome
| Others |
| RA | Realtor Associate
| Others |
| RA | Rear Admiral
| Others |
| RA | Rebel Angel
| Others |
| RA | Rebellious Ants
| Others |
| RA | Recent Action
| Others |
| RA | Receptor Antagonist
| Others |
| RA | RechtsAnwalt
| Others |
| RA | Record Attempt
| Others |
| RA | Recovery Advisory
| Others |
| RA | Rectus Abdominis
| Others |
| RA | Recursion Available
| Others |
| RA | Red Armor
| Others |
| RA | Redeemed Assassin
| Others |
| RA | Redifferentiation And Apoptosis
| Others |
| RA | Reference Archive
| Others |
| RA | Refractory Anaemia
| Others |
| RA | Refractory Ascites
| Others |
| RA | Regiment of Artillerists
| Others |
| RA | Regional Academy
| Others |
| RA | Regional Advisor
| Others |
| RA | Regional Anaesthesia
| Others |
| RA | Regional Assembly
| Others |
| RA | Registeraccountant (Netherlands)
| Others |
| RA | Registered Accountant
| Others |
| RA | Registered Agreement
| Others |
| RA | Registered Architect
| Others |
| RA | Registration Authority
| Others |
| RA | Registry Agent
| Others |
| RA | Regression Analysis
| Others |
| RA | Regulatory Affairs
| Others |
| RA | Regulatory Agency
| Others |
| RA | Regulatory Alerts
| Others |
| RA | Rejected Adventure
| Others |
| RA | Religious Advisor
| Others |
| RA | Rely And
| Others |
| RA | Remington Arms
| Others |
| RA | Remote Access Data file
| Others |
| RA | Remote Area
| Others |
| RA | Remuneration and Audit
| Others |
| RA | Renal Agenesis
| Others |
| RA | Renal Artery
| Others |
| RA | Rental Agreement
| Others |
| RA | Replenishment Advisement
| Others |
| RA | Reported Against
| Others |
| RA | Reporting Address
| Others |
| RA | Republic Act
| Others |
| RA | Republic of Armenia
| Others |
| RA | Requested Action
| Others |
| RA | Required Attention
| Others |
| RA | Requirements Analysis
| Others |
| RA | Research Airplane
| Others |
| RA | Research Analysis
| Others |
| RA | Research Article
| Others |
| RA | Research Assistant
| Others |
| RA | Research Associate
| Others |
| RA | Research Association
| Others |
| RA | Reset Actors
| Others |
| RA | Resident Adviser
| Others |
| RA | Resident Advisor
| Others |
| RA | Resident Agency
| Others |
| RA | Resident Assistant
| Others |
| RA | Resident Authority
| Others |
| RA | Residental Advisor
| Others |
| RA | Residential Advisor
| Others |
| RA | Residential Assistant
| Others |
| RA | Residents Association
| Others |
| RA | Resource Academia
| Others |
| RA | Resource Action
| Others |
| RA | Respect Authority
| Others |
| RA | Respiratory Arrest
| Others |
| RA | Response Action
| Others |
| RA | Restore Advanced
| Others |
| RA | Restricted Access
| Others |
| RA | Restricted Artistic
| Others |
| RA | Retail Arbitrage
| Others |
| RA | Retained Autograph
| Others |
| RA | Retard Advance
| Others |
| RA | Retarded Arsehole
| Others |
| RA | Retinoic Acid
| Others |
| RA | Return Address
| Others |
| RA | Return All
| Others |
| RA | Return Authorization
| Others |
| RA | Returns Authorization
| Others |
| RA | Revenue Account
| Others |
| RA | Revenue Account (!)
| Others |
| RA | Revenue Incentive Agreement Undefined
| Others |
| RA | Review Access
| Others |
| RA | Rheumatoid Arthrisi
| Others |
| RA | Rheumatoid Arthritis
| Others |
| RA | Rhinolophus Affinis
| Others |
| RA | Richard Attenborough
| Others |
| RA | Ricks Academy
| Others |
| RA | Riders And
| Others |
| RA | Ridwaanullah Allahs
| Others |
| RA | Right Aft
| Others |
| RA | Right Anterior
| Others |
| RA | Right Argument
| Others |
| RA | Right Arm
| Others |
| RA | Right Atrial
| Others |
| RA | Right Atrium
| Others |
| RA | Rights Action
| Others |
| RA | Ripped Analhole
| Others |
| RA | Rises Above
| Others |
| RA | Risk Analysis
| Others |
| RA | Risk Assessment
| Others |
| RA | Ritual Abuse
| Others |
| RA | Robo Adversaries
| Others |
| RA | Roger Alden
| Others |
| RA | Roleplaying Association
| Others |
| RA | Rolling Acres
| Others |
| RA | Room Air
| Others |
| RA | Roone Arledge
| Others |
| RA | Rosin Activated
| Others |
| RA | Rotate Acs
| Others |
| RA | Rotational Atherectomy
| Others |
| RA | Rotten Apples
| Others |
| RA | Roughness Analysis
| Others |
| RA | Roughness Average
| Others |
| RA | Rounded Atelectasis
| Others |
| RA | Route Advertisement
| Others |
| RA | Route of Administration
| Others |
| RA | Router Advertisement
| Others |
| RA | Routing Area
| Others |
| RA | Royal Academician
| Others |
| RA | Royal Academy
| Others |
| RA | Royal Ambassadors
| Others |
| RA | Royal Arch
| Others |
| RA | Royal Armorer
| Others |
| RA | Rubber Armoring
| Others |
| RA | Rubella Abortus
| Others |
| RA | Run Away
| Others |
| RA | Running Account
| Others |
| RA | Runs Against
| Others |
| RA | Runs Allowed
| Others |
| RA | Ruth Armstrong
| Others |
| RA | Ryan And Aneta
| Others |
| RA | The Real Articles
| Others |