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IT Abbreviations & Acronyms: Comprehensive Glossary

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There are currently 135 acronyms in this directory beginning with the letter R.
R
R&D
Research and Development
R3
Reduce, Reuse, Recycle
RA
Registration Authority
RAC
Real Application Cluster
RACE
Rapid Access Computing Environment
RACF
Resource Access Control Facility
RACI
Responsible, Accountable, Consulted, Informed
RAD
Rapid Application Development
rad/s or rad/sec
Radian Per Second
radar
Radio Detection and Ranging
RADIUS
Remote Authentication Dial-In User Service
RAF
Risk Assessment Framework
RAID
Redundant Array of Independent Disks
RAID 0
Redundant Array of Independent Disks Mode 0 - Disk Striping
RAID 1
Redundant Array of Independent Disks Mode 1 - Disk Mirroring
RAID 3
Redundant Array of Independent Disks Mode 3 - Parity Disc
RAIN
Redundant/Reliable Array Of Inexpensive/Independent Nodes
RAM
Random Access Memory
RAMAC
Random Access Method Of Accounting and Control
RAMDAC
Random Access Memory Digital-To-Analog Converter
Rand
Reasonable and Nondiscriminatory
RAP
Revenue Acquisition Process
RARP
Reverse Address Resolution Protocol
RAS
Remote Access Server
RAS API
Remote Access Server Application Program Interface
RASHport
Routing and Special Handling
RAT
Remote Administration Tool
RBA
Risk-Based Authentication
RBAC
Role-Based Access Control
RBOC
Regional Bell Operating Company
RCA
Root Cause Analysis
RCE
Remote Code Execution
RCP
Rich Client Platform
RD
Running Disparity
RDBMS
Relational Database Management System
RDC
Remote Deposit Capture
RDF
Resource Description Framework
RDM
Raw Device Mapping
RDMA
Remote Direct Memory Access
rDNS
Reverse DNS
RDO
Remote Data Objects
RDP
Remote Desktop Protocol
RDRAM
Rambus Dynamic Random Access Memory
RDS
Amazon Relational Database Service
RDSMS
Relational Data Stream Management System
RDT&E
Research, Development, Testing & Evaluation
REC
Regional Extension Center
ReFS
Resilient File System
regex
Regular Expression
RELAX NG
Relax Next Generation
Remoting
Powershell Remoting
REST
Representational State Transfer
RF, rf, orr.f.
Radio Frequency
RFC
Remote Function Call
RFI
Remote File Inclusion or Request for Information
RFID
Radio Frequency Identification
RFM analysis
Recency, Frequency, Monetary
RFO
Request For Offer
RFP
Request For Proposal
RFQ
Request For Quotation
RFR
Red Flags Rule
RGB
Red, Green, and Blue
RHCVA
Red Hat Certified Virtualization Administrator
RHEL
Red Hat Enterprise Linux
RHEV
Red Hat Enterprise Virtualization
RHS
Red Hat Storage
RIA
Rich Internet Application
RIAA
Recording Industry Association Of America
RIBLOE
Remote Insight Board -- Lights Out Edition
RID
Relative Identifier
RIM
Records Information Management
RIP
Routing Information Protocol
RIR
Regional Internet Registry
RIS
Remote Installation Service
RISC
Reduced Instruction Set Computer
RJE
Remote Job Entry
rlogin
Remote Login
RMA
Return Material (or Merchandise) Authorization
RMI
Remote Method Invocation
RMON
Remote Network Monitoring
RMS
Root-Mean-Square
RNAAPP
Remote Network Access Application
RNIS
Reseau Numerique A Integration De Services
ROA
Resource-oriented Architecture
ROADM
Reconfigurable Optical Add-Drop Multiplexer
ROC
Report On Compliance
ROD
Reuse-oriented Model or Reuse-oriented Development
RODC
Read-Only Domain Controller
RoHS Directive
Restriction Of Hazardous Substances Directive
ROI
Return On Investment
ROIC
Return On Invested Capital
ROKSO
Register Of Known Spam Operations
ROLAP
Relational Online Analytical Processing
ROM
Read Only Memory
ROMI
Return On Marketing Investment
RONA
Return On Net Assets
ROP
Reorder Point
Ror or Rails
Ruby On Rails
RoS
Restoration of Service
RoT
Roots Of Trust
ROU
Record Of Understanding
ROWE
Results-Only Work Environment
RPC
Remote Procedure Call
RPG
Report Program Generator or Role-Playing Game
RPM
Remote Patient Monitoring
RPO
Recruitment Process Outsourcing
RPR
Resilient Packet Ring
RPT
Rich Presence Technology
RQ
Risk Intelligence
RRAM
Resistive Ram
RRS
Reduced Redundancy Storage
RSAT
Microsoft Remote Server Administration Tools
RSC
Retail Service Center
RSI
Requirements Stability Index
RSoP
Resultant Set Of Policy
RSVP
Resource Reservation Protocol
RT
Retweet
RTA
Real-Time Application
RTC
Real-Time Communications
RTCD
Real-Time Communications Dashboard
RTCP
Real-Time Transport Control Protocol
RTD
Research and Technical Development
RTF
Rich Text Format
RTLS
Real-Time Location System
RTM
Read The Manual
RTO
Recovery Time Objective
RtOI
Real-Time Operational Intelligence
RTOS
Real-Time Operating System
RTP
Real-Time Transport Protocol
RTSP
Real Time Streaming Protocol
RTT
Round-Trip Time
RUM
Real-user Measurement
RUP
Rational Unified Process
RWU
Remote Wakeup
RZ
Return-To-Zero

A quick reference guide for Information Technology (IT) related acronyms and abbreviations.

As a service to IT personnel everywhere (and also for ourselves) we’ve compiled a comprehensive list of IT-related acronyms and abbreviations.

Acronyms can be pronounced as words, like NASA and UNESCO; as individual letters, like FBI, TNT, and ATM; or as both letters and words, like JPEG (pronounced JAY-peg).

Abbreviations formed from a string of initials and usually pronounced as individual letters are more specifically called initialisms or alphabetisms.

No matter how you refer to these IT-related terms, please use our quick reference guide or search TechTerms.com to help decode the world of IT abbreviations and acronyms.

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