| RAS | Racing Academy Sachsenring 
| Others |
| RAS | Radar Absorbing Skin
| Military, Air Force, Defence, Weapon, Technology |
| RAS | Rail Adapter System
| Others |
| RAS | Rajasthan Administrative Services
| Others |
| RAS | Rajasthan Administrator Service
| Others |
| RAS | Random Assorted Stuff
| Others |
| RAS | Rapid Assessment System
| Others |
| RAS | Raster Image
| Others |
| RAS | Rattle Air Supply
| Others |
| RAS | Reading Award Scheme
| Others |
| RAS | Real African Seed
| Others |
| RAS | Real Application Security
| Others |
| RAS | Real Authentic Sound
| Others |
| RAS | Really Archaic Standard
| Others |
| RAS | Rear Access System
| Others |
| RAS | Rear Active Steer
| Others |
| RAS | Rear Air Suspension
| Others |
| RAS | Rear Area Security
| Others |
| RAS | Rear Axle Steering
| Others |
| RAS | Reasonable Articulable Suspicion
| Others |
| RAS | Reassign Allowance Sectors
| Others |
| RAS | Recaro Automotive Seating
| Others |
| RAS | Recirculating Aquaculture System
| Others |
| RAS | Record Association System
| Others |
| RAS | Recovery Activation Signal
| Others |
| RAS | Recurrent aphthous stomatitis
| Others |
| RAS | Recursive Acronym Syndrome
| Others |
| RAS | Redirecting Antibody Specificity
| Others |
| RAS | Redundant Acronym Syndrome
| Others |
| RAS | Reel Animation Studios
| Others |
| RAS | Reflex Anoxic Seizures
| Others |
| RAS | Refueling At Sea
| Others |
| RAS | Regional Administrators Service
| Others |
| RAS | Registered Addiction Specialist
| Others |
| RAS | Registration Admission and Status
| Others |
| RAs | Registration Authorities
| Others |
| RAS | Registration, Admission, and Status
| Others |
| RAS | Registration, Admissions, and Status
| Others |
| RAS | Reimbursable Advisory Services
| Others |
| RAS | Relative Army Strength
| Others |
| RAS | Relative Athletic Score
| Others |
| RAS | Relative Athletic Scores
| Others |
| RAS | Reliability And Service
| Others |
| RAS | Reliability Availability And Scalability
| Others |
| RAS | Reliability Availability And Serviceability
| Others |
| RAS | Reliability, Availability and Serviceability
| Others |
| RAS | Reliability, Availability, Serviceability
| Others |
| RAS | Remedy Archive System
| Others |
| RAS | Remote Acceleration Sensor
| Others |
| RAS | Remote Access Sampler
| Others |
| RAS | Remote Access Server
| Others |
| RAS | Remote Access Service
| Others |
| RAS | Remote Access Services
| Others |
| RAS | Remote Access Setup
| Others |
| RAS | Remote Access Software
| Others |
| RAS | Remote Access Support
| Others |
| RAS | Remote Access System
| Others |
| RAS | Remote Administration Service
| Others |
| RAS | Remote Administrator Server
| Others |
| RAS | Remote Analysis System
| Others |
| RAS | Remote Application Server
| Others |
| RAS | Remote Application Service
| Others |
| RAS | Remote Authentication Service
| Others |
| RAS | Remote Authorization System
| Others |
| RAS | Renal Artery Stenosis
| Others |
| RAS | Renault Accident Services
| Others |
| RAS | Renin Angiotensin System
| Others |
| RAS | Renin Angiotensin Systems
| Others |
| RAS | Renin-Angiotensin System
| Others |
| RAS | Replenishment At Sea
| Others |
| RAS | Replicate And Simulate
| Others |
| RAS | Report Application Server
| Others |
| RAS | Required at Site
| Others |
| RAS | Requirements Allocation Sheet
| Others |
| RAS | Requirements Automation System
| Others |
| RAS | Research Associates of Syracuse
| Others |
| RAS | Resident and Associate Society
| Others |
| RAS | Resource Allocation And Scheduling
| Others |
| RAS | Resource Allocation System
| Others |
| RAS | Respiratory assessment service
| Others |
| RAS | Restate Answer And Support
| Others |
| RAS | Restricted Active Space
| Others |
| RAS | Results of About Search
| Others |
| RAS | Resume Acceleration Switch
| Others |
| RAS | Reticular Activating System
| Others |
| RAS | Reticular Activation System
| Others |
| RAS | Retinoic acid syndrome
| Others |
| RAS | Retiree Account Statement
| Others |
| RAS | Retirement Annuitant Services
| Others |
| RAS | Retrovirus Associated Sequences
| Others |
| RAS | Return Activated Sludge
| Others |
| RAS | Reusable Asset Specification
| Others |
| RAS | Reviews About Stuff
| Others |
| RAS | Right Angle Sports
| Others |
| RAS | Risk Administration Services
| Others |
| RAS | Risk advisory services
| Others |
| RAS | Risk Appetite Statement
| Others |
| RAS | River Analysis Software
| Others |
| RAS | River Analysis System
| Others |
| RAS | Road Safety Assurance Standard
| Others |
| RAS | Roadmaster Active Suspension
| Others |
| RAS | Roadside Assistance Services
| Others |
| RAS | Roadside Assistance Solutions
| Others |
| RAS | Robotics and Automation Society
| Others |
| RAS | Rochester Animal Services
| Others |
| RAS | Rokitansky-Aschoff sinus
| Others |
| RAS | Rootes Armstrong Siddely
| Others |
| RAS | Rootes Armstrong Siddley
| Others |
| RAS | Rope Access Solutions
| Others |
| RAS | Rotational Allocation Strategy
| Others |
| RAS | Rotational atherectomy system
| Others |
| RAS | Roti And Solo
| Others |
| RAS | Routing Address Source
| Others |
| RAS | Row Access Strobe
| Others |
| RAS | Row Address Select
| Others |
| RAS | Row Address Strobe
| Others |
| RAS | Royal Agricultural Society
| Others |
| RAS | Royal Agricultural Society of New Zealand
| Others |
| RAS | Royal Astronomical Society
| Others |
| RAS | Running And Screaming
| Others |
| RAS | Russian Academy of Sciences
| Others |
| RAS | Russian Automobile Society
| Others |
| RAS | Ruthie awesomeness syndrome
| Others |
| RAS | Sun RASter image Bitmap graphics
| Others |
| RAS | Sun Raster Image format
| Others |