143 R Ring R&R Rate & Route R&SE Research & Systems Engineering R/O Read/Only R/W Read Write R/WM Read/Write Memory RABID Rebellion Against Big Irrepressible Dweebs RAD Radical RAID Rendundant Array Of Inexpensive Disks RAM Really Awfull Music RAM Random Access Memory RAM Random-Access Memory RAMP Reliability, Availability, Maintainability Program RAND Rural Area Network Design RAO Regional Accounting Office RAO Revenue Accounting Office RAR Return Address Register RASC Residence Account Service Center RBG Realtime Business Group RBHC Regional Bell Holding Company RBOC Regional Bell Operating Company RBOR Request Basic Output Report RC Reduced Cost RC Regional Center RC Resistance-Capacitance RC MAC Recent Change Memory Administration Center RCC Radio Common Carrier RCC Remote Cluster Controller RCC Reverse Command Channel RCF Remote Call Forwarding RCLDN Retrieval of Calling Line Directory Number RCM Remote Carrier Module RCSC Remote Spooling Communications Subsystem RCU Radio Channel Unit RCVR Receiver RDB Relational Database RDC Radiance RDES Remote Data Entry System RDS Radio Digital System RDSN Region Digital Switched Network RDT Radio Digital Terminal RDT Remote Digital Terminal RDT Restricted Data Transmissions REC Regional Engineering Center REM Radical Elite Movement REM Remote Equipment Module REMOBS Remote Observation System REN Renaissance REN Ring Equivalence Number REP Repertory Dialing REV Revolt REV Revenue or Revision REXX Restructured Extended Executer Language RF Radio Frequency RF Radio Frequency RFC Request For Comments RFI Radio Frequency Interference or Request for Information RFP Request for Proposal RGB Red Green Blue RH Relative Humidity RID Remote Isolation Device RIOT Revolution In Our Time RIP Revolutionizing International Piracy RIP Routing Information Protocol RIS Remote Installation Service RISC Rise In Superior Couriering RISC Reduced Instruction Set Computer RISD Reference Information Systems Development RISLU Remote Integrated Services Line Unit RJE Remote Job Entry RLCM Remote Line Concentrating Module RLL Run Length Limited RLT Reality RLT Remote Line Test RMAS Remote Memory Administration System RMK Romkids RMR Remote Message Registers RMS Root Mean Squared RMS Root-Mean-Square RN Reference Noise RNOC Regional Network Operations Center RO Read Only RO Receive Only ROA Return On Assets ROB Remote Order Buffer ROC Regional Operating Company ROH Receiver Off Hook ROI Return On Investment ROM Read Only Memory ROT Rebels Of Telecommunications ROT Reign of Terror ROTL Remote Office Test Lines RPC Remote Procedure Call RPE Remote Peripheral Equipment RPM Reduced Parts Menu RPM Relentless Pursuit of Magnificence RPM Revolution Per Minute or Rotations Per Minute RPV Remotely Piloted Vehicle RQS Rate/Quote System RQS The Rate Quote System RQSM Regional Quality Service Management RQT Reliability Quality Test RR Rescue Leader RRO Reports Receiving Office RSA Reference System Architecture RSA Repair Service Attendant RSAT Reliability and System Architecture Testing RSB Repair Service Bureau RSC Remote Switching Center RSC Residence Service Center RSCS Remote Source Control System RSCS Remote Spooling Communications Subsystem RSE Removable Storage Elements RSL Remote Ship List RSLE Remote Subscriber Line Equipment RSLM Remote Subscriber Line Module RSM Ransom RSM Remote Switching Module RSS Remote Switching System RSTE/E Resource System Time Sharing / Enhanced RSTS/E Resource Sharing Time Sharing / Extended RSTS/E Resource System Time Sharing / Environment RSU Remote Switching Unit RSVP RDB Solutions Vendor Program RSVP Revolutionary Surrealist Vandal Party RT Real Time RTA Real-Time Accelerator RTA Remote Trunk Arrangement RTBG Real Time Business Group RTD Resistance Temperature Detector RTE Remote Terminal Emulation RTL Ritual RTL Resistor-Transistor Logic RTM Regional Telecommunications Management RTM Remote Test Module RTS Remote Testing System RTS Request to Send RTU Remote Trunking Unit RUM Remote User Multiplex RWC Remote Work Center RX Receive Data RX Remote Exchange RZR Razor 1911