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Acronyms
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
| R | Right |
| R | Reliability |
| R | Resistor |
| R&A | Review and Analysis |
| R&D | Research and Development |
| R&M | Reliability and Maintainability |
| R&M | Repair and Maintenance |
| R&O | Report and Order |
| R&S | Reconnaissance and Surveillance |
| R&S | Rest and Relaxation |
| R&TTE | Radio and Telecommunications Terminal Equipment |
| R-C | Resistor-Capacitor network |
| R-D | Rate Distortion |
| R-HOUR | Hour at which Retaliation is Authorized |
| R-T | Real Time |
| R/A | Radius of Action |
| R/G | Ring Ground |
| R/M | Reliability/Maintainability |
| R/R | Remove and Replace |
| R/T | Receiver Transmitter |
| R/W | Read/Write |
| R2P2 | Rapid Response Planning Process |
| R3B | Resources and Requirements Review Board |
| RA | Resolution Advisory (generated by TCAS) |
| RA | Radio Altimeter |
| RA | Radio Access |
| RA | Rear Area |
| RA | Reinforced Alert |
| RA | Restricted Article |
| RA | Risk Analysis |
| RAAD | Rapid Architecture Application Development |
| RAAMS | Remote Anti-Armor Mine System |
| RAAMS L/S | Remote Antiarmor Mine System Long/Short |
| RAAP | Rapid Application of Air Power |
| RAASP | Reusable Ada Avionics Software Package |
| RAB | Registrar Accreditation Board |
| Rabbit Tracks | Rabbit Tracks,or running rabbits, refer to the distinctive display produced by another (alien radar) radar system transmission. |
| RABFAC | Radar Beacon Forward Air Control |
| RABFAC | Radar Beacon Forward Air Controller |
| RAC | Rapid Action Change |
| RAC | Readiness Acceptance Check |
| RAC | Regional Air Commander |
| RAC | Reliability Analysis Center |
| RAC | Repair Action |
| RAC | Request For Authority to Contract |
| RAC | Risk Assessment Code |
| RACA | Regional Airspace Control Authority |
| RACE | R&D in Advanced Communication Technology, Europe |
| RACE | Rapid Automatic Cryptographic Equipment |
| RACE | Rapid off-line Crypto Equipment |
| RACE | Research in Advanced Communications for Europe |
| RACF | Radio Access Control Function |
| RACF | Resource Access Control Facility |
| RACH | Random Access Channel |
| RACM | Risk Analysis and Cost Management |
| RACP | Regional Airspace Control Plan |
| RAD | Radiation |
| RAD | Radiation Absorbed Dose |
| RAD | Rapid Application Development |
| RAD | Recommendation and Approval Document |
| RAD | Request for Authority to Develop |
| RADALT | Radar Altitude |
| Radar | Radio Detecting And Ranging. A system that measures distance and bearing to an object. |
| RADAR | Radio Detecting And Ranging |
| Radar Mile | The time interval (approximately 12.359 microseconds) required for radio waves to travel one nautical mile and return (total of 2 nmi). |
| RADBN | Radio Battalion |
| RADC | Regional Air Defense Commander |
| RADC | Rome Air Development Center (Air Force Research Laboratory (Rome Site)) |
| RADDS | Radar Data Distribution Switchboard |
| RADFREQ | Radar Frequency |
| RADGUNS | Radar Directed Gun Simulation System |
| RADHAZ | Radiation Hazard |
| RADHAZ | Radiation Hazards |
| RADIAC | Radioactivity Detection, Indication and Computation |
| Radial | A line of direction going out from a VOR station measured as a bearing with respect to magnetic north. |
| RADINT | Radar Intelligence |
| RADIUS | R&D for Imagery Understanding Systems |
| RADIUS | Remote Access Dial-In User Server |
| RADIUS | Remote Authentication Dial In User Service |
| RADIUS | Research and Development for Image Understanding Systems |
| RADOC | Regional Air Defense Operations Center |
| Radome | The radome is the protective cover on the aircraft nose that fits over the weather radar system antenna. The radome is transparent at radar frequencies. |
| RADSL | Rate Adaptive Digital Subscriber Line |
| RADSL | Rate-Adapting ADSL |
| RAF | Resource Allocation Figure |
| RAF | Royal Air Force |
| RAH-66 | Comanche helicopter |
| RAI | Radio Altimeter Indicator |
| RAI | Rangeless Airborne Instrumentation |
| RAI | Remote Alarm Indication |
| RAID | Redundant Array of Independent Discs |
| RAID | Redundant Array of Inexpensive Disks |
| RAID | Redundant Arrays of Inexpensive Disks |
| RAIDS | Rangeless Airborne Instrumentation Distributed System |
| RAIDS | Rapid Anti-Ship Missile Integrated Defense System |
| RAILE | Retro-Assisted Imaging Laser Experiment |
| RAIM | Receiver Autonomous Integrity Monitoring |
| RAINS | Regional Alliances for Infrastructure and Network Security |
| RAL | Registered Asset List |
| RAL | Restricted Access Location |
| RALCC | Regional Airlift Coordination Center |
| RALS | Remote Area Landing System |
| RALT | Radio Altimeter (also RA,RADALT, LRA,LRRA) |
| RALT | Radar Altitude |
| RALU | Register Arithmetic Logic Unit |
| RALU | Resistor and Arithmetic Logic Unit |
| RAM | Random Access Memory. Generally used to describe read/write integrated circuit memory. |
| RAM | Radar Absorbent Material |
| RAM | Radar Absorbing Material |
| RAM | Random Access Memory |
| RAM | Reliability And Maintainability |
| RAM | Reliability, Availability and Maintainability |
| RAM | Reliability, Availability, Maintainability |
| RAM | Reliability, Availability, and Maintainability |
| RAM | Remote Access Multiplexer |
| RAM | Rolling Airframe Missile |
| RAMA | Resource Auction Multiple Access |
| RAMCAD | Reliability and Maintainability Computer aided Design |
| RAMCC | Regional Air Movement Coordination Center |
| RAMDAC | Random Access Memory Digital to Analog Converter |
| RAMEC | Rapid Action Minor Engineering Change |
| RAMICS | Rapid Airborne Mine Clearance System |
| RAMIT | Rate Aided Manually Implemented Tracking |
| RAMP | Rapid Acquisition of Manufactured Parts |
| RAMP-NOW | Rapid Acquisition of Manufactured Parts-Navy Operational Workcell |
| RAMPS | Rapid Message Preparation System |
| RAMS | Regional Atmospheric Modeling System |
| RAMS | Reliability and Maintainability Symposium |
| RAMS | Repairable Assets Management System |
| RAMTIP | Reliability And Maintainability Technology Insertion Program |
| RAN | Radio Access Network |
| RAN | Regional Air Navigation |
| RAN | Request For Authority to Negotiate |
| RAND | Random Challenge Memory |
| RAND | Reasonable and Non-Discriminatory |
| RAND | Research And Development |
| RandI | Recognition and Identification |
| RAOC | Rear Area Operations Center |
| RAOC | Regional Air Operations Center |
| RAOP | Regional Air Operations Plan |
| RAP | Radio Access Point |
| RAP | Radiological Assistance Program |
| RAP | Recognized Air Picture |
| RAP | Reliable Acoustic Path |
| RAP | Remedial Action Program |
| RAP | Resource Allocation Process |
| RAP | Risk Aversion Plan |
| RAP | Rocket Assisted Projectile |
| RAPCON | Radar Approach CenterS |
| RAPID | Reusable Ada Products For Information Systems Development |
| RAPID | Reusable Ada Products for Information Systems Development. |
| RAPID-WS | Requirements Analysis Process in Design for Weapon Systems |
| RAPIDS | Real-Time Automated Personnel Identification System |
| RAPIDSIM | Rapid Intertheater Deployment Simulator |
| RAPLOC | Rapid Localization |
| RAPPS | Remote Area Precision Positioning System |
| RARBI | Radar Altimeter Beacon Interface |
| RARP | Reverse Address Resolution Protocol |
| RAS | RowAddress Strobe |
| RAS | Random Access Storage |
| RAS | Registration, Administration, and Status |
| RAS | Remote Access Server |
| RAS | Remote Access Service |
| RAS | Remote Access Services |
| RAS | Replenishment At Sea |
| RASC | Radio Access System Controller |
| RASER | Research and Seeker Emulation Radar |
| RASP | Random Access Stored Program Machine |
| RASP | Recognized Air Surface Picture |
| RASP | Reusable Avionics Software Project |
| RASREQ | Replenishment At Sea Request |
| RASS | Random Access Storage System |
| RASSP | Rapid Prototyping of Application Specific Signal Processing |
| RASSP | Rapid Prototyping of Application Specific Signal Processors |
| RAST | Receive And Send Terminal |
| RAST | Recovery Assistant Secure and Traverse |
| RAT | RAM Air Temperature is the temperature of the air entering an air scoop inlet. It is a factor in engine performance. |
| RAT | RAM Air Turbine |
| RAT | Reliability Assessment Testtmtram Air Turbine |
| RAT | Rocket Assisted Torpedo |
| RATCC | Regional Air Traffic Control Center |
| RATCF | Radar Air Traffic Control Facility |
| RATERQ | Rate Request |
| RATT | Radio Teletype |
| RATT | Radioteletype |
| RAU | Radio Access Unit (Army) |
| RAV | Robotic Air Vehicle |
| RAW | Read After Write |
| RAW | Read and Write |
| RAWS | Radar Altimeter Warning System |
| RB | Roll Back |
| RB TWSS | Radar Based Through the Wall Surveillance System |
| RBA | Revolution in Business Affairs |
| RBAC | Role Based Access Control |
| RBAF | Radio Bearer Adaptation Function |
| RBB | Residential BroadBand |
| RBBS | Remote Bulletin Board System |
| RBC/NGP | Rack Based Console/Next Generation Peripheral |
| RBCS | Remote Bar Coding System (USPS) |
| RBE | Remain Behind Equipment |
| RBECS | Revised Battlefield Electronic CEOI System |
| RBER | Residual Bit Error Rate |
| RBL | Reliability Based Logistics |
| RBN | Regional Broadband Network |
| RBO | Radio Beacon Omnidirectional |
| RBOC | Regional Bell Operating Companies |
| RBS | Ration by Schedule |
| RBS | Radar Bombardment System |
| RBS | Repository Brokerage Services |
| RBSE | Repository-Based Software Engineering |
| RBT | Requirements Based Testing |
| RBV | Rapid Battlefield Visualization |
| RBV | Roll Back Version |
| RBW | Resolution Band Width |
| RC | Recoverability Code |
| RC | Reduced Charge |
| RC | Regional Conflict |
| RC | Repair Coordinator |
| RC | Required Capability |
| RC | Reserve Component |
| RC | Reserve Components |
| RC | Response Center |
| RC | Routing Control |
| RC EAST | Regional Command East |
| RC NORTH | Regional Command North |
| RC SOUTH | Regional Command South |
| RC SOUTHEAST | Regional Command South-East |
| RC SOUTHLANT | Regional Command South Atlantic |
| RC WEST | Regional Command West |
| RC&D | Resource Conservation and Development |
| RCA | Reuse Cost Avoidance |
| RCA | Root Cause Analysis |
| RCAS | Reserve Component Automation System |
| RCAS | Reserve Component Automation System (Army) |
| RCC | Remote Charge Converter |
| RCC | Regional Coordinating Center |
| RCC | Report Control Code |
| RCC | Rescue Coordination Center |
| RCC | Return Channel for Cable |
| RCC | regional Control Center |
| RCCB | Remote Controled Circuit Breaker |
| RCCO | Reverse Current Cut Out |
| RCDD | Registered Communications Distribution Designer |
| RCF | Radio Control Function |
| RCF | Registration Confirm |
| RCF | Registration Control Field |
| RCH | Random Access Channel |
| RCI | Residential Communities Initiative |
| RCL | RAPID Center Library |
| RCL | Radio Communications Link |
| RCL | Radio Control Link |
| RCLP | Residual Code Linear Predictive coding |
| RCM | Radar Counter Measures |
| RCM | Reliability Centered Maintenance |
| RCM | Requirements Correlation Matrix |
| RCOH | Refueling and Complex Overhaul |
| RCP | Radio Control Panel |
| RCP | Radio Control Protocol |
| RCP | Region Oil and Hazardous Pollution Contingency Plan |
| RCR | Relative Cost of Reuse |
| RCRA | Resource Conservation and Recovery Act |
| RCS | Radar Cross Section |
| RCS | Radio Communication System |
| RCS | Regional Control of Shipping |
| RCS | Report Control System |
| RCS | Resource Control System |
| RCT | Return Channel Terrestrial |
| RCTC | Rewriteable Consumer Time Code |
| RCTL | Resistor Capacitor Transistor Logic |
| RCV | Receive |
| RCVR | Receiver |
| RCWR | Relative Cost of Writing for Reuse |
| RCZ | Rear Combat Zone |
| Rd | R-Channel used for data |
| RD | Random Defect |
| RD | Rate Distortion |
| RD | Regional Director |
| RD | Requirements Development |
| RD&A | Research Development and Acquisition |
| RD&A | Research, Development & Acquisition |
| RD&ES | Requirement Determination & Execution System |
| RD&P | Research, Development and Production |
| RDA | Recommended Daily Allowance |
| RDA | Relational Distributed Architecture |
| RDA | Remote Database Access |
| RDA | Requirements Development and Analysis |
| RDA | Research, Development and Acquisition |
| RDADS | Real Time Data Acquisition And Display System |
| RDAISA | Research, Development and Acquisition Information Systems Agency |
| RDAP | Remote Data Access and Protocol |
| RDB | Relational Data Base |
| RDB | Relational Database |
| RDB | Requirements Data Bank |
| RDBMS | Relational Data Base Management System |
| RDBMS | Relational Database Management System |
| RDC | Rapid Deployment Capability |
| RDC | Remote Device Control |
| RDC | Remote Data Concentrator |
| RDCO | Research and Development Coordination Office |
| RDD | Required Delivery Date |
| RDD-REL | Rights Data Dictionary-Rights Expression Language |
| RDDL | Resource Directory Description Language |
| RDDS | Research and Development Descriptive Summaries |
| RDEC | (U.S. Army CECOM) Research Development Engineering Center |
| RDF | Radio Detection Finding |
| RDF | Radio Direction Finding |
| RDF | Rapid Deployment Force |
| RDF | Resource Description Framework |
| RDG | Random Data Generator |
| RDGT | Reliability Development Growth Test |
| RDI | Remote Detect Indication |
| RDMI | Radio Distance Magnetic Indicator |
| RDMS | Range Data Management System |
| RDMS | Relational Data Management System |
| RDN | Relative Distinguished Name |
| RDN | Relative Distinguished Names |
| RDO | Rapid Decisive Operations |
| RDP | Rapid Deployment Patrol |
| RDR | Radar |
| RDR CTRL | Radar Control |
| RDRAM | Rambus Dynamic Random Access Memory |
| RDS | Radio Data Service |
| RDS | Requirements Definition Study |
| RDSC | Radar Digital Scan Converter |
| RDSR | Receiver Data Service Request |
| RDSS | Radio Determination Satellite Service |
| RDSS | Radio Determination and Satellite System |
| RDSS | Rapidly Deployable Surveillance System |
| RDSS/C | Research and Development Streamlined Solicitation/Contracts |
| RDT | Reliability Demonstration Test |
| RDT | Reliability Development Test |
| RDT | Remote Debriefing Tool |
| RDT | Remote Digital Terminal |
| RDT&E | Research, Development, Test and Evaluation |
| RDT&E/A/N/AF | RDT&E (Appropriation), Army/Navy/AF |
| RDT&EN | Research, Development, Test and Evaluation Navy |
| RDVT | Reliability Design Verification Test |
| RDY | Ready |
| RE | Risk Exposure |
| RE&D | Research,Engineering and Development |
| RE/RE | Reinforcement/Resupply |
| REA | Rapid Environmental Assessment |
| REA | Remote Entity Approximation |
| REA | Request For Equitable Adjustment |
| REA | Rural Electrification Association |
| REAC | Radiation Emergency Assistance Center |
| REAC/TS | Radiation Emergency Assistance Center/Training Site |
| REACT | Rapid Execution and Combat Targeting System |
| READS | Requirements Entry Allocation Decomposition System |
| REAP | Reengineering Application Project |
| REBOOT | Reuse Based Object-Oriented Technology |
| REBOOT | Reuse By Object Oriented Techniques |
| REC | RECeive alarm |
| REC | Radio Electronic Combat |
| REC | Radio-Electronic Combat |
| REC | Radioelectronic Combat |
| REC | Receiver |
| REC | Record |
| REC | Rectifier |
| REC | Regional Emergency Coordinator |
| RECAP | Reliability Evaluation and Corrective Action Program |
| RECCEXREP | Reconnaissance Exploitation Report |
| RECF | Receiving Force |
| RECIRC | Recirculating |
| RECO | Remote Command and Control |
| RECONEX | Reconnaissance Exercise |
| RECP | Regional Emergency Services Communications Planner |
| RECS | Radio-Electronic Combat Support |
| RECSHIP | Receiving Ship |
| RECSTA | Receiving Station |
| REDCAP | Real Time Electronic Digitally Controlled Analyzer Processor |
| REDCON | Readiness Condition |
| REE | Requirements Engineering Environment |
| REF | Reference |
| REFER | Refrigerated |
| REFL | Reflection |
| Reflectivity Factor(Z) | This is a measurement of the ability of a target to reflect the energy from a radar beam. |
| REG | Register |
| REG | Regulation |
| REGEN | Regenerator |
| REGT | Regiment |
| REILS | Runway end Identifier Light System |
| REJ | Reject |
| REL | Relative |
| REL | Recovered Energy Logic |
| REL | Release |
| Relative Bearing | The bearing of a ground station relative to the direction the aircraft nose points,or the direction of an air craft to or from an NDB. |
| RELP | Residual Excited Linear Prediction |
| RELSAT | Relay Satellite |
| REM | Remote |
| REM | Resolution Enhancement Technology |
| REMACT | Remedial Action |
| REN | Ringer Equivalence Number |
| REP | Radio-Electronic Protection |
| REP | Regional Evacuation Point |
| REPLANT | Naval Training Systems Center Representative Atlantic |
| REPLO | Regional Emergency Preparedness Liaison Officer |
| REPPAC | Naval Training Systems Center Representative Pacific |
| REQ | Required |
| REQ | Requisition |
| REQ-MP | Request Mode Proposal |
| REQ-MR | Request Mode Request |
| REQD | Required |
| REQM | Requirements Management |
| REQOTE | REequest for QuOTEs message, EDIFACT |
| RERT | Radiological Emergency Response Team |
| RES | RESolution |
| RES | Radar Environment Simulation |
| RES | Radiation Exposure State |
| RES | Radio Equipment Systems |
| RES | Risk Estimate of the Situation |
| RESA | Research, Evaluation and System Analysis Model |
| RESC | Reuse Executive Steering Committee |
| RESCAP | Rescue Combat Air Patrol |
| RESCAP | Resource Capabilities discovery |
| RESCO | Rescue |
| RESHAPE | Resource, Self Help, Affordability, Planning Effort |
| Resolution Advisory | A display indication given to the pilot recommending a maneuver to increase vertical separation relative to an intruding aircraft. A resolution advisory is also classified as corrective or preventive. |
| RESOLV | Resolver |
| RESS | Radar Environment Simulator System |
| RET | Rapid Exit Taxiway |
| RET | Reliability Evaluation Test |
| RET | Resolution Enhancement Technology |
| RET | Retract |
| RETCO | Regional Emergency Transportation Coordinator |
| RETS | Real Estate Transaction Standard |
| REU | Remote Electronics Unit |
| REVIC | Revised Intermediate COCOMO |
| REW(S) | Radio Electronic Warfare (Service) |
| RF | Radio Frequency. A general term for the range of frequencies above 150 kHz,to the infra-red region (1012 Hertz). |
| RF | Radio Frequency |
| RF | Reaction Force |
| RF | Reprographic Facility |
| RF(A) | Reaction Force (Air) |
| RF(A)S | Reaction Forces (Air) staff |
| RFA | Recurrent Fault Analysis |
| RFA | Request for Federal Assistance |
| RFA | Request for Final Approval |
| RFA | Restricted Fire Area |
| RFAF | Russian Federation Air Force |
| RFB | Request for Bid |
| RFC | Remote Feature Control |
| RFC | Remote Function Call |
| RFC | Request For Change |
| RFC | Request For Comment |
| RFC | Request For Commitment |
| RFCM | Radio Frequency Countermeasures |
| RFD | Request For Deviation |
| RFD/W | Request For Deviation/Waver |
| RFER | Residual Frame Error Rate |
| RFG | Revalidated Force Goal |
| RFHQ | Reaction Force Headquarters |
| RFI | Radio Frequency Interference |
| RFI | Ready For Issue |
| RFI | Request For Information |
| RFIC | Radio Frequency Integrated Circuit |
| RFID | Radio Frequency Indentification |
| RFL | Restricted Fire Line |
| RFL | Restricted Frequency List |
| RFO | Remote Foreign Office |
| RFOM | Restriction on Freedom Of Movement |
| RFP | Request For Proposal |
| RFP | Radio Fixed Parts |
| RFPI | Rapid Force Projection Initiative |
| RFPICC | Rapid Force Projection Initiative Command and Control |
| RFQ | Request For Quotation |
| RFREQ | Receive Frequency |
| RFS | Remote File Sharing |
| RFS | Remote File System |
| RFSS | Radio Frequency Simulation System |
| RFSS | Radio Frequency Switching System |
| RFT | Ready For Training |
| RFT | Remote Feeding Telecommunication |
| RFT | Request For Technology |
| RFTP | Request For Technical Proposal |
| RFU | Radio Frequency Unit |
| RFU | Request For Update |
| RFW | Radio Frequency Weapon |
| RFW | Request For Waiver |
| RG | Remote Gateway |
| RG | Residential Gateway |
| RGB | Red Green Blue |
| RGBI | Red Green Blue Intensity |
| RGBIT | Rigging Built In Test |
| RGCSP | Review of the General Concept of Separation Panel |
| RGIP | Residential Gateway Internal Protocol |
| RGS | Range Gate Stealing |
| RGS | Remote Ground Sensor |
| RGS | Requirements Generation System |
| RGT | Right |
| RH | Radar Head |
| RH | Radiation Hardened |
| RH | Radiation Hazard |
| RH | Relative Humidity |
| RHA | Regional Health Administrator |
| RHAW | Radar Homing and Warning |
| RHIB | Rigid Hull Inflatable Boat |
| RHP | Reconfigurable Hardware Product |
| RHQ | Rear Headquarters |
| RHQ AFNORTH | Regional Headquarters Allied Forces North |
| RHQ AFSOUTH | Regional Headquarters Allied Forces South |
| RHQ EASTLANT | Regional Headquarters East Atlantic |
| RHQ SOUTHLANT | Regional Headquarters South Atlantic |
| RHQ WESTLANT | Regional Headquarters West Atlantic |
| RHS | Rural Housing Service |
| RI | Record Item |
| RI | Routing Indicator |
| RIA | Rich Internet Applicatio |
| RIA | Rich Internet Application |
| RIA | Rock Island Arsenal |
| RIAA | Recording Industry Association of America |
| RIB | Right Inboard |
| RIB | Resource Integration Board |
| RIC | Reconstruction Information Center |
| RIC | Record Item Complex |
| RIC | Reinvention Impact Center |
| RIC | Repairable Items Conference |
| RIC | Repatriation Information Center |
| RIC | Resource Implementation Cooperative |
| RICC | Reusable Integrated Command Center |
| RID | RTI Initialization Data |
| RIF | Radar Interface |
| RIF | Reduction In Force |
| RIG | Reuse Library Interoperability Group |
| RIL | Repairable Items List |
| RILSD | Resident Integrated Logistics Support Detachment |
| RIM | Radar Intercept Missile |
| RIM | Read-In Mode |
| RIM | Reference Information Model |
| RIM | Research In Motion |
| RIM | Robotics in Manufacturing |
| RIML | Rule Identification Markup Language |
| RIMPAC | Rim of the Pacific |
| RIMS | Radar Image Modeling System |
| RIMS | Research and Development Information Management System |
| RIN | UK Royal Institute of Navigation |
| RIP | Radar Improvement Plan |
| RIP | Readiness Improvement Program |
| RIP | Request In Process |
| RIP | Router Information Protocol |
| RIP | Routing Information Protocol |
| RIPL | Reconnaissance Indication Planning Line |
| RIPL | Remote Initial Program Load |
| RIPSO | Revised Interconnection Protocol Security Option |
| RIPSO | Revised Internet Protocol Security Option |
| RIR | Repatriation Information Report |
| RIS | Radar Integration System |
| RIS | Range Instrumentation Systems |
| RISA | Reduced Instruction Set Architecture |
| RISC | Reduced Instruction Set Computer |
| RISC | Reduced Instruction Set Computing |
| RISC | Regional Interagency Steering Committee |
| RISC | Research Institute for Symbolic Computation |
| RISM | Reduced Instruction Set Model |
| RISTA | Reconnaissance, Intelligence, Surveillance and Target Acquisition |
| RISTA II | Reconnaissance infrared Surveillance Target Acquisition, Second Generation Technology II |
| RIT | Rochester Institute of Technology |
| RITN | Real Time Information Transfer and Networking |
| RITSC | Regional Information Technology Service Center |
| RIU | Radar Interface Unit |
| RIW | Reliability Improvement Warranty |
| RJ | Registered Jack |
| RJ | Rivet Joint |
| RJ-45 | 8-pin modular connector |
| RJAG | Reuse Joint Activities Group |
| RJE | Remote Job Entry |
| RK | Radial Keratectomy |
| RKA | Rekey Agent |
| RL | Requirement List |
| RL | Return Loss |
| RL | Rocket Launcher |
| RL | Rome Laboratories (now Air Force Research Laboratory, Rome Site) |
| RLAN | Radio Local Area Network |
| RLCG | Resistance, Inductance, Capacitance, and Conductance |
| RLD | Ready to Load Date |
| RLE | Run Length Encoding |
| RLF | Reusability Library Framework |
| RLF | Reuse Library Framework |
| RLG | Ring Laser Gyro |
| RLL | Run Length Limited |
| RLMS | Radar Land Mass Simulator |
| RLMS | Radar Landmass Simulator |
| RLP | Radio Link Protocols |
| RLR | Receive Loudness Rating |
| RLS | Remote Light Sensor |
| RLS | Reliable Link Source |
| RLT | Regimental Landing Team |
| RLY | Relay |
| RM | Reference Monitor |
| RM | Replaceable Module |
| RM | Resource Management |
| RM | Restriction of Movement |
| RM&S | Reliability Maintainability and Supportability |
| RM-ODP | Reference Model for Open Distributed Processing |
| RMA | Rate Monotonic Analysis |
| RMA | Reliability, Maintainability and Availability |
| RMA | Reliability, Maintainability, Availability |
| RMA | Returned Material/Merchandise Authorization |
| RMA | Revolution in Military Affairs |
| RMA | Risk Management Agency |
| RMARTS | Rate Monotonic Analysis for Real-Time Systems |
| RMCC | Readiness and Movement Coordination Center |
| RMI | Radio Magnetic Indicator |
| RMI | Remote Method Invocation |
| RMLS | Reusable Military Launch System |
| RMMIE | Remote Modem Management Information Exchange |
| RMNCS | Regional Manager National Communications System |
| RMNG | Remaining |
| RMO | Resource Management Office (GSA) |
| RMO | Route Management Organization |
| RMOA | Realtime Multimedia Over ATM |
| RMON | Remote Monitoring |
| RMP | Remote Maintenance Panel |
| RMP | Recognized Maritime Picture |
| RMP | Reliable Multicast Protocol |
| RMP | Risk Management Plan |
| RMPM | Requirements Management Process Model |
| RMR | Remote Map Reader |
| RMRI | Risk Management Research Institute |
| RMS | Root Mean Square |
| RMS | Remote Minehunting System |
| RMS | Requirements Mediations Service |
| RMSD | Requirements, Models, Software, and Data |
| RMSE | Root Mean Square Error |
| RMWG | Requirements Management Working Group |
| RMX | Reverse Mail Exchange |
| RNA | Remote Network Access |
| RNAV | Random Navigation/Area Navigation |
| RNAV | Radar Navigation |
| RNCC | Reference Number Category Code |
| RNCS | Regional Naval Control of Shipping |
| RND | Random |
| RNG | Range |
| RNGA | Range Arc |
| RNP | Required Navigation Performance |
| RNR | Receiver Not Ready |
| RNS | Radar Navigation Set |
| RNTDS | Restructured Naval Tactical Data System |
| RNTDS | Restructured Navy Tactical Data System |
| RNVC | Reference Number Variation Code |
| RO | Roll Out |
| RO | Requirements Officer |
| RO | Risks Officer |
| RO/RO | Roll On/Roll Off |
| RO/RO | Roll-On/Roll-Off |
| ROA | Radius Of Action |
| ROA | Return on Assets |
| ROADS | Rapid Open Architecture Distribution Systems (Army) |
| ROAMOPS | Roaming Operations |
| ROAMS | Reusable Object Access Management System |
| ROAMS | Reusable Object Access and Management System |
| ROAR | Research on Ongoing Acquisition Research |
| ROB | Right Outboard |
| ROC | Rate Of Climb |
| ROC | Regional Operating Center |
| ROC | Regional Operations Center |
| ROC | Report on Comments |
| ROC | Required Operational Capabilities |
| ROC | Required Operational Capability |
| ROCD | Reuse Operational Concept Document |
| ROCE | Rules of Coordination and Engagement |
| ROD | Rate of Descent |
| ROD | Record Of Decisions |
| ROD | Report Of Deficiency |
| ROE | Rules Of Engagement |
| ROEREQ | Rules Of Engagement Request |
| ROF | Receipt Of Funds |
| ROI | Return On Investment |
| ROI | Region of Interest |
| ROIC | Return On Investment Capital |
| ROK | Republic of Korea |
| ROLAIDS | Reconfigurable On-Line ATE Information Distribution System |
| ROLMS | Retail Ordinance Logistics Management System |
| ROLR | Receive Objective Loudness Rating |
| ROM | Read Only Memory |
| ROM | Rough Order of Magnitude |
| ROMC | Required Operational Messaging Characteristics |
| ROOM | Real-time Object-Oriented Modeling |
| ROP | Report On Proposals |
| ROR | Range Only Radar |
| RORSAT | Radar Ocean Reconnaissance Satellite |
| ROS | Reduced Operational Status |
| ROS | Report Of Survey |
| ROSE | Remote Operation Service Element |
| ROSE | Remote Operations Service Element |
| ROSS | Russian Ocean Surveillance System |
| ROT | Receive Only Terminal |
| ROTA | Risks Other Than Attack |
| ROTC | Reserve Officers’ Training Corps |
| ROTHR | Relocatable Over-The-Horizon Radar |
| ROTS | Ruggedized Off-The-Shelf |
| ROV | Range of View |
| ROV | Remotely Operated Vehicle |
| ROW | Rest Of the World |
| ROWPU | Reverse Osmosis Water Purification Unit |
| ROZ | Restricted Operating Zone |
| RP | Radio Ports |
| RP | Rapid Prototyping |
| RP | Reception Party |
| RP | Recommended Practice |
| RP | Reference Points |
| RP | Release Point |
| RP | Reporting Post |
| RP | Rocket Projectile |
| RP-AS | Ringing, Pulse-Alerting Signal |
| RPAL | Reserve Personnel Allowance List |
| RPC | Recognized Air Picture Production Center |
| RPC | Remote Procedure Call |
| RPCU | Radio Port Control Unit |
| RPE | Regular Pulse Excitation |
| RPF | Remote Power Feed |
| RPG | Recommended Practices Guide |
| RPG | Report Generator |
| RPG | Report Program Generator |
| RPG | Rocket Propelled Grenade |
| RPGS | RAMP PDES Generation Site |
| RPIE | Real Property Installed Equipment |
| RPM | Revolutions Per Minute |
| RPMA | Real Property Maintenance Activity |
| RPO | Recovery Point Objective |
| RPO | Reuse Project Officer |
| RPOA | Recognized Private Operating Agency (CCITT) |
| RPOD | Rail Point Of Debarkation |
| RPP | Regional Priority Plan |
| RPP | Reverse Pair Positioning |
| RPR | Reference Picture Resampling |
| RPR | Resilient Packet Ring |
| RPROM | Reprogrammable Read Only Memory |
| RPS | Provisional Site Acceptance |
| RPS | Reference Picture Selection |
| RPU | Rotor phasing Unit |
| RPV | Remotely Piloted Vehicle |
| RPWM | Rules of Procedure and Working Methods |
| RQT | Reliability Qualification Tests |
| RQV | Running Quality Value |
| RR | Readiness Review |
| RR | Reduced Reference |
| RR | Regional Reinforcement |
| RR | Rejection Report |
| RR | Resource Record |
| RR | Response and Recovery |
| RR | Round Robin |
| RR-NR | Reduced Reference-No Reference |
| RRC | Requirements Review Council (Army) |
| RRC | Rigid Raiding Craft |
| RRDB | Rapidly Reconfigurable Data Base |
| RRDF | Ready Reserve Force |
| RRDS | Reduced Resolution Data Set |
| RRF | Rapid Reaction Force |
| RRF | Ready Reserve Force |
| RRH | Remote Radar head |
| RRIS | Rapid Response Information System |
| RRJ | Registration Reject |
| RRL | Radio Relay Link |
| RRM | Rapid Response Manufacturing |
| RRP | Rapid Reinforcement Plan |
| RRQ | Registration Request |
| RRR | Rapid Runway Repair |
| RRR | Requirements Rational Report |
| RRT | Regional Response Team |
| RRTF | Return and Reconstruction Task Force |
| RRU | Reduced Resolution Update |
| RS | Radio System |
| RS | Radiocommunications Sector |
| RS | Relay System |
| RS | Requirements Statement |
| RS | Role Specialization |
| RS-SC | Remote Spooling Communication System |
| RSA | Rapid Simulation Aids |
| RSA | Real Sector Access |
| RSA | Rear Support Area |
| RSA | Reusable Software Asset |
| RSA | Rivest, Shamir, & Adleman (public key encryption technology) |
| RSA | Rural Service Area |
| RSB | Record Structure Builder |
| RSB | Regional Shipping Board |
| RSB | Reinforcement Support Category |
| RSC | Radar Scan Converter |
| RSCC | Regional Stocks under CINCSOUTH Control |
| RSCC | rear Support Coordination Center |
| RSDC | Reconnaissance-Strike-Defense Complex |
| RSDN | Regional Switched Digital Network |
| RSF | Residential Standards Forum |
| RSFCT | Road Simulator for Fire Control Testing |
| RSG | Rear Support Group |
| RSG | Research Study Group |
| RSGCP | Reliable Signaling Gatway Control Protocol |
| RSGP | Reliable Signaling Gateway Protocol |
| RSI | Radiation Status Indicator |
| RSI | Rationalization, Standardization, and Interoperability |
| RSI | Repetitive Strain Injury |
| RSID | Residential System Identification |
| RSIS | Rotorcraft Systems Integrated Simulator |
| RSKM | Risk Management |
| RSL | Reference System Lab |
| RSL | Reusable Software Library |
| RSLP | Rocket System Launch Program |
| RSM | Requirements Spiral Model |
| RSML | Rule Structure Markup Language |
| RSN | Role Specialist Nation |
| RSO&I | Reception, Staging, Onward Movements and Integration |
| RSOI | Reception, Staging, Onward Movement and Integration |
| RSOM | Reception, Staging and Onward Movement |
| RSP | Reversion Select Panel |
| RSP | Recognized Sea Picture |
| RSPA | Research and Special Programs Administration |
| RSPC | Real Time Statistical Process Control |
| RSPL | Recommended Spare Parts List |
| RSQ | Rescue |
| RSR | Repair Survival Rate |
| RSR | Required Supply Rate |
| RSR | Runtime Status Register |
| RSS | Really Simple Syndication |
| RSS | Remote Satellite Simulation |
| RSS | Rich Site Summary |
| RSSC | Radar-Sonar Surveillance Center |
| RSSI | Received Signal Strength Indication |
| RSSI | Received Signal Strength Indicator |
| RST | Reset |
| RSTA | Reconnaissance, Surveillance and Target Acquisition |
| RSTA | Reconnaissance, Surveillance, and Target Acquisition |
| RSTC | Reconnaissance-Strike-Target Complex |
| RSUP | Reliable State Update Protocol |
| RSVP | Repondez S'il Vous Plait (French for Respond If You Please) |
| RSVP | Resource Reservation Protocol |
| RSVR | Reservoir |
| RT | Receiver-Transmitter (rt). Also referred to as a transceiver (see T/R). |
| RT | Real Time |
| RT | Receiver Transmitter |
| RT | Regression Testing |
| RT | Remote Terminal |
| RT | Round Trip |
| RT | Test Analysis Report |
| RTA | Receiver Transmitter Antenna |
| RTA | Required Time of Arrival |
| RTA | Research and Technology Agency |
| RTAD | Relocatable Targets Analysis Data |
| RTB | Remote Test Base |
| RTB | Research and Technology Board |
| RTB | Return To Base |
| RTBM | Real Time Bit Mapping |
| RTC | Radio Transmission Control |
| RTC | Real Time Clock |
| RTC | Real Time Communication |
| RTC | Recruit Training Command |
| RTC | Remote Terminal Controller |
| RTC | Reserve and Training Command |
| RTC | Return to Control |
| RTC | Rough Terrain Crane |
| RTCA | Radio Technical Commission for Aeronautics |
| RTCA | Real Time Casualty Assessment |
| RTCH | Rough Terrain Container Handler |
| RTCNS | Real Time Communications Network Simulator |
| RTCP | Real Time Control Protocol |
| RTCS | Real Time Clock System |
| RTD | Resistance Thermal Detector |
| RTD | Resonant Tunneling Diode |
| RTD | Round Trip Delay |
| RTDI | Responsive Theater Defense Interceptors (USAF) |
| RTE | Real Time Executive |
| RTE | Remote Terminal Equipment |
| RTE | Run Time Efficiency |
| RTE | Run Time Environment |
| RTESS | Real Time Embedded and Specialized System |
| RTF | Radiotelephony |
| RTF | Radio Terminal Function |
| RTF | Response Task Force |
| RTF | Response to Forecast |
| RTF | Rich Text Format |
| RTG | Reconnaissance Technical Groups |
| RTI | Real-Time Interrogate |
| RTI | Real Time Interface |
| RTI | Run Time Infrastructure |
| RTI | Run Time Interconnect |
| RTI | Run Time Interface |
| RTI | Runtime Infrastructure |
| RTIC | Rapid Target In Cockpit (USAF) |
| RTIC | Real Time Information in Cockpit |
| RTIC | Real Time Information in the Cockpit |
| RTIF | RAMP Test and Integration Facility |
| RTL | Register Transfer Language |
| RTL | Register Transfer Level |
| RTL | Resistor Transistor Logic |
| RTL | Rolling Target List |
| RTLM | Real Time Link Management |
| RTM | Radar Training Missile |
| RTM | Requirements Traceability Management |
| RTM | Return To Manufacturer |
| RTML | Rule Triggering Markup Language |
| RTN | Received Track Number |
| RTN | Regional Telecommunications Network |
| RTN | Return |
| RTNC | Returned To National Control |
| RTO | Rejected Takeoff |
| RTO | Research and Technology Organization |
| RTO | Responsible Test Organization |
| RTOC | Rapid Target Out of Cockpit (USAF) |
| RTOK | Retest OK |
| RTOS | Real Time Operating System |
| RTOS | Reconfigurable Tactical Operations Simulator |
| RTP | Reliability Test Plan |
| RTP | Radio Tuning Panel |
| RTP | Real Time Protocol |
| RTP | Real Time Transport Protocol |
| RTP | Release To Production |
| RTP | Remote Test Package |
| RTP | Request For Technical Proposal |
| RTQC | Real Time Quality Control |
| RTR | Real Time Re-targeting |
| RTR | Receiver Transmitter |
| RTR | Report of Test Results |
| RTR | Revised Technical Report |
| RTS | Request To Send |
| RTS | Radar Tracking Station |
| RTS | Real Time System |
| RTS | Reliable Transfer Service |
| RTS | Return To Stock |
| RTS | Revised Technical Specification |
| RTS | Run Time Systems |
| RTS-CTS | Request to Send-Clear to Send |
| RTSMP | Real Time Symmetric Multiprocessor |
| RTSP | Real Time Signal Processor |
| RTSP | Real Time Streaming Protocol |
| RTT | Radio Transmission Technologies |
| RTT | Round Trip Time |
| RTT | Round Trip Timing |
| RTTC | Regional Technical Transfer Center |
| RTTCP | Real Time Transport Control Protocol |
| RTTE | Radio and Telecommunication Terminal Equipment |
| RTTY | Radio Teletype |
| RTU | Radio Tuning Unit |
| RTU | Remote Terminal Unit |
| RTU | Right to Use |
| RTV | Rapid Terrain Visualization |
| RTV | Real Time Video |
| RTX | Request Retransmission |
| RTYPE | Rounding Type |
| RU | Replaceable Unit |
| RUC | Reporting Unit Code |
| RUFP | Reflected Unique Findable Pattern |
| RUID | Real User Identification |
| RUIPT | Rapid User Interface Prototyping Tool |
| RULER | Remaining Useful Life Evaluation Routine (lubricants) |
| Runway Incursion | The act of inadvertently crossing the runway holding point without ATC clearance. |
| RUP | Rational Unified Process |
| RUS | Rural Utilities Service |
| RUWS | Remote Unmanned Work System |
| RV | Re-entry Vehicle |
| RV | Relief Valve |
| RVA | Reuse Value Added |
| RVDT | Rotary Voltage Differential Transducer |
| RVDT | Rotary Variable differential Transformer |
| RVI | Reverse Interrupt |
| RVL | Rolling Vertical Landing |
| RVLC | Reversible Variable Length Codes |
| RVM | Reference Validation Mechanism |
| RVML | Rich Vector Markup Language |
| RVR | Runway Visual Range |
| RVSM | Required Vertical Separation Minimums |
| RVV | Runway Visibility Value |
| RW | Radiological Warfare |
| RW | Rotary Wing |
| RWI | Radar Warning Installation |
| RWM | Read-Write Memory. A memory in which each cell is selected by applying appropriate electrical input signals, and the stored data may be either sensed at the appropriate output terminal or changes in response to other electrical input signals. |
| RWM | Read Write Memory |
| RWM | Read-Write Memor |
| RWP | Real world Parameter |
| RWR | Radar Warning Receive |
| RWR | Radar Warning Receiver |
| RWS | Reconfigurable Workstation |
| RWS | Remote Winsock |
| RWW | Read While Writing |
| RWY | Runway |
| RX | Receive |
| RXMT | Retransmi |
| RZ | Return to Zero |
