R	Reflect
R+DWA	Routing +Distributed Wavelength Assignment
RA	Receiver Address
RA	Receiver's Address
RA	Recursion Available
RA	Registration Authority
RA	Router Advertisement
RA	Routing Area
RAA	Re-Auth-Answer
RAB	Roman Architecture Board
RADIUS	Remote Access Dial-In User Service
RADIUS	Remote Authentication Dail-In User Service
RADIUS	Remote Authentication Dial In User Service
RADIUS	Remote Authentication Dial-In User Service
RAI	Remote Alarm Indication
RAL	RPL-Aware Leaf
RAN	RPL-Aware Node
RAN	Radio Access Network
RAO	Router Alert Option
RAP	Random Access Point
RAR	Re-Auth-Request
RAR	Re-Authorization-Request
RARP	Reverse Address Resolution Protocol
RAS	Remote Access Server
RAT	Robust Audio Tool
RATP	RELIABLE ASYNCHRONOUS TRANSFER PROTOCOL
RBAC	role-based access control
RBDC	Rate-Based Dynamic Capacity
RBNF	Routing Backus-Naur Form
RBP	Rate-based pacing
RBR	Realm Border Router
RC	RARELY-CHANGING
RC	RS Client
RC	Reliable Connected
RC	Repair Context
RC	Request Class
RC	Restart Complete
RC	Routing Context
RC	record count
RC	report count
RCA	Receive-Configure-Ack
RCA	Release Change Authorization
RCC	Requested Contiguous Concatenation
RCDN	Registry-Class Domain Name
RCDO	Reduced-Complexity Decoding Operation
RCE	Remote Controlled Echoing
RCM	Radio Control Module
RCN	Receive-Configure-Nak/Rej
RCR	Receive-Configure-Request
RCS	Reassembly Check Sequence
RCT	Recommended Cache Time
RD	Reliable Datagram
RD	Reorder Density
RD	Reported Distance
RD	Route Distinguisher
RD	Router Discovery
RD	Routing Directive
RDA	Requested Destination Address
RDAP	Registration Data Access Protocol
RDDP	Remote Direct Data Placement
RDE	Registry Data Escrow
RDF	Rate Decrease Factor
RDF	Resource Description Framework
RDI	Remote Defect Indication
RDI	Reverse Defect Indication
RDM	Replay Detection Method
RDM	Russian Doll Model
RDM	Russian Dolls Model
RDMA	Remote Direct Memory Access
RDMA-CM	Remote Direct Memory Access -Connection Manager
RDMAP	Remote Direct Memory Access Protocol
RDN	Relative Distinguished Name
RDP	Reliable Data Protocol
RDS	RAQMON Data Source
RDS	Resolver Discovery Service
RE	Raw Ethertype
RE	Redundancy Elimination
RE	record end
RE	regular expression
REC	Read Exchange Concise
RECN	Really Explicit Congestion Notification
RED	Random Early Detection
REE	Rich Execution Environment
REMB	Receiver Estimated Max Bitrate
REP	Remote Encode Program
RER	Receive-Echo-Request
RERL	Residual Echo Return Loss
RESG	Roman Engineering Steering Group
RET	Re-encapsulation Throughput
REWG	requirements evaluation working group
RF	Radio Frequency
RFC	Request For Comments
RFD	Route Flap Damping
RFQ	Request For Quotation
RG	Redundancy Group
RG	Research Group
RG	Residential Gateway
RG	Routing Gateway
RGP	Redemption Grace Period
RGP	Registry Grace Period
RGRS	Reporting Group Reporting Sources
RH	Request/Response Header
RH	Rule Holder
RH	receiving host
RHC	Return Hop Count
RHO	Redirected Header Option
RI	RNIC Interface
RI	Receive Index
RI	Restricted Identification
RI	Router Information
RI	Routing Information
RIB	Routing Information Base
RIF	Rate Increase Factor
RIF	Routing Information Field
RIG	Referral Internet Groper
RIG	Related Interest Group
RII	Request Identification Information
RII	Routing Information Indicator
RIM	Receive Initialization Mode
RIO	Route Information Option
RIP	Routing Information Protocol
RIR	Regional Internet Registry
RIU	Receiving Interworking Unit
RJE	Remote Job Entry
RJRS	Recovery Journal Receiver Structure
RJS	Remote Job Service
RJSS	Recovery Journal Sending Structure
RKAP	Reconfiguration Key Authentication Protocol
RKM	Routing Key Management
RLC	Radio Link Control
RLC	Random Linear Coding
RLCF	reverse loop current feed
RLDRAM	reduced latency dynamic random-access memory
RLE	Run Length Encoding
RLFA	Remote Loop-Free Alternate
RLMI	Resource List Meta-Information
RLP	Resource Location Protocol
RLQ	Relative Link Quality
RLT	Radio Link Terminal
RLU	Randomized Least Used
RM	Requester Module
RM	Resource Management
RM	Route Monitoring
RM	Rule Maker
RMBE	Remote Memory Buffer Element
RMCAT	RTP Media Congestion Avoidance Techniques
RMF	Resource Management Function
RMS	root-mean-square
RMSS	RECEIVER MAXIMUM SEGMENT SIZE
RMT	Reliable Multicast Transport
RMTP	Reliable Multicast Transport Protocol
RN	RELOAD Node
RN	Receiver Name
RN	Routing Number
RNG	Random Number Generator
RNIC	RDMA Network Interface Card
RO	Route Optimization
ROA	Route Origin Authorization
ROI	return-on-investment
ROLIE	Resource-Oriented Lightweight Indicator Exchange
ROLIE	Resource-Oriented Lightweight Information Exchange
ROM	read-only memory
ROSE	Remote Operation Service Element
ROSE	Remote Operations Service Element
ROW	right of way
RP	Reference Point
RP	Relying party
RP	Rendevous Point
RP	Rendezvous Point
RP	Reply Path
RP	Request Parameters
RP	Route Processor
RP	Routing Processor
RP	receiving process
RPA	Relying party agreement
RPA	Rendezvous Point Address
RPA	Rendezvous-Point Address
RPC	Remote Procedure Call
RPC	remote-procedure call
RPF	Reverse Path Forwarding
RPH	Resource Priority header
RPH	Resource-Priority Header
RPI	RPL Packet Information
RPKI	Resource Public Key Infrastructure
RPL	Remote Program Load
RPL	Rendezvous Point Link
RPLC	Reference Picture List Construction
RPN	Registered Parameter Number
RPPF	RAQMON Parameter Presence Flags
RPR	Relay Peer Routing
RPR	Resilient Packet Ring
RPSI	Reference Picture Selection Indication
RPSL	Routing Policy Specification Language
RPSL	Routing Policy System Language
RPTF	Responder's Preferred Timestamp Format
RPU	Reverse path update
RPZ	Response Policy Zone
RQ	Receive Queue
RR	Receiver Report
RR	Resolution Records
RR	Resource Record
RR	Return Routability
RR	Reverse Request
RR	Round Robin
RR	Route Reflector
RR	reception report
RR	requesting router
RRC	RAQMON Report Collectors
RRC	Radio Resource Control
RRD	Registration Request Delay
RRDP	RPKI Repository Delta Protocol
RRE	Resource Requesting Entity
RRFD	Resv Received, Forward Data
RRG	Routing Research Group
RRL	Response Rate Limiting
RRO	Record Route Object
RRP	Registry Registrar Protocol
RRQ	Reinstate Recovery Qualifier
RRT	Return Routability Test
RS	Recording Session
RS	Reed-Solomon
RS	Remote Server
RS	Report Segment
RS	Retransmission Server
RS	Route Server
RS	Router Solicitation
RSA	Rivest Shamir Adleman
RSA	Rivest-Shamir-Adleman
RSAG	RFC Series Advisory Group
RSC	Receive Segment Coalescing
RSCN	Registered State Change Notification
RSCV	Route Selection control vector
RSE	RFC Series Editor
RSI	Receiver Summary Information
RSI	Request Sequence Initiative
RSK	Receiver Secret Key
RSL	Resource Services Language
RSN	Reservation Sequence Number
RSN1	Reservation Sequence Number 1
RSNA	robust security network association
RSOC	RFC Series Oversight Committee
RSP	Rendered Service Path
RSRD	Resv Sent, Reverse Data
RSS	Receive Side Scaling
RSS	received signal strength
RSS	relay set selection
RSSAC	Root Server System Advisory Committee
RSSI	Received Signal Strength Indicator
RST	Register-Stop Timer
RSTP	Rapid Spanning Tree Protocol
RT	Redirection Target
RT	Redundant Trees
RT	Route Tag
RT	retransmission time
RTA	Receive-Terminate-Ack
RTA	Registration-Termination-Answer
RTBH	Remote Triggered Black Hole
RTC	Real Time Collaboration
RTC	Real-Time Communication
RTC	Return to Control
RTCP	Real Time Control Protocol
RTCP	Real-Time Control Protocol
RTE	Run-Time Exception
RTF	Responder Timestamp Format
RTFM	Read The F*cking Manual
RTFM	Real-Time Flow Measurement
RTFM	Realtime Traffic Flow Measurement
RTI	Run Time Infrastructure
RTJ	Request to Join
RTL	right-to-left
RTM	Residence Time Measurement
RTM	Response Time Monitoring
RTMP	Real Time Messaging Protocol
RTMP	Routing Table Maintenance Protocol
RTO	Retransmission Time Out
RTP	Rapid Transport Protocol
RTP	Real Time Protocol
RTP	Real-Time Protocol
RTR	Ready to Receive
RTR	Receive-Terminate-Request
RTR	Registration-Termination-Request
RTS	Request To Send
RTSC	Read The Source Code
RTSP	Real Time Streaming Protocol
RTSP	Real-Time Streaming Protocol
RTT	Round-Trip Time
RTT	round trip times
RTTM	Round-Trip Time Measurement
RTU	Remote Terminal Unit
RU	request/response unit
RUC	Receive-Unknown-Code
RUL	RPL-Unaware Leaf
RUV	Replica Update Vector
RV	RDMA Version
RW	RESTART WINDOW
RWR	Request-with-Response
RXER	Robust XML Encoding Rules
RZERC	Root Zone Evolution Review Committee