The following terms starting with the letter "R" have specific pages dedicated to them. You can come back to this page or the main Computer Terms page by using the navigation breadcrumbs at the bottom of each page.

• RADIUS = Remote Authentication Dial-In User Service
• RADSL = Rate-Adaptive Digital Subscriber Line
• RAID = Redundant Array of Independent (or Inexpensive) Disks
• RAM = Random Access Memory
• RAMDAC = Random Access Memory Digital-to-Analog Converter
• RARP = Reverse Address Resolution Protocol
• RAS = Remote Access Services
• RC4 = RC4 Stream Cipher (Rivest Cipher 4 or Ron's Code)
• RDBMS = Relational Database Management System
• RDF = Resource Description Framework
• RDRAM = Rambus DRAM
• Registry = A guide to Windows registry information
• RFC = Request for Comments
• RFI = Radio Frequency Interference
• RFID = Radio Frequency Identification
• RFP = Request for Proposal
• RGB = Red Green Blue
• RIP = Raster Image Processor
• RIP = Regulation of Investigatory Powers Act 2000
• RISC = Reduced Instruction-Set Computing
• RJ-11 & RJ-45 = Registered Jack-11 & Registered Jack-45
• RLL = Run Length Limited
• RMB = Right Mouse Button
• RMON = Remote Monitoring
• RMTP = Reliable Multicast Transport Protocol
• ROFL = Rolling On Floor, Laughing
• ROM = Read-Only Memory
• RPG = Report Program Generator
• RPG = Role-Playing Game
• rpm = Revolutions per Minute
• RSN = Real Soon Now
• RSVP = Resource Reservation Setup Protocol
• RTF = Rich Text Format
• RTFM = Read The F___ing Manual
• RTSP = Realtime Streaming Protocol
• RTT = Round-trip Time