R

R/A

Raceway

Rack

Rack-and-Panel Connector

Radio Frequency

Radio Frequency Connector

Radio Frequency Interference

Radio Guide

RAID

Raised Base

RAM

Ramp

Random Access

Random Access Memory

Range Wire

RAST

RAST 5

Ratchet Control

Rated Temperature

Rated Voltage

Raven Machine

RCC

RCT

RD

RDL

Reactance

Read Only Memory

Read Out (or Readout)

Read/Write Memory

Real Estate

Real Seal

Real Soldering

Rear Plug Up

Rear Release Contacts

Rear Seal

Receiver

Receiving Element

Receptacle

Receptacle Connector

Receptacle Housing

Rectangular Terminal

Rectifier

Reference Edge

Reflectance

Reflection

Reflection Coefficient

Reflow

Reflow Soldering

Reflowing

Refractive Index

Regrind

Regrind Percent

Regulation

Reinforced Sheath

Relative Permeability

Relative Permittivity

Relative Velocity of Propagation

Relay

Relay Socket

Release Force

Reliability

Reluctance

Removable Contact

Removal Tool

Repeatability

Re-reeling Systems

Reset Position

Resiliency

Resistance

Resistance Soldering

Resistive Termination

Resistivity

Resistor

Resonance

Resource Structure

Retention Pins

RETMA

Retractile Cord

Return Loss

Reverse Bias Diode

Reverse Entry

RF

RF Connector

RF Leakage

RFI

RG

RG/U

RH

RHD

RHDL

Rheostat

RHL

RHM

RHML

RH/RW

Ribbon Cable

Right Angle Edge Connector

Ring Terminal

Ring Tongue Terminal

Ringing Out

Ripple

Rise Time

Rise Time Connector

Riser

Riser Cable

RJ

RJFJ

RJIJ

RL

RLJFJ

RLJWJ

RM

RMA Flux

RML

RMS

Rocker Switch

Rockwell Hardness Number

ROM

Root Mean Square

Rope Strand

Rosin Flux

Rotary Switch

Rotational Torque

Round Conductor Flat Cable

Round Conductor Ribbon Cable

Round Trip

Router

RP

RR

RRW

RS

RS232, RS442, RS449

RTL

RU

Rubber

Rugged Signal Connector

RUH

Runner

Runner Weight