QF Quenching Frequency 猝熄频率，(超再生接收机中的)致歇频率

QIC Quarter-Inch Cartridge 四分之一英寸磁带卡匣

QL Query Language 询问语言

QM Quadrature Modulation 直角相位调制，平方律调制

QoS Quality Of Service 服务品质

QT Qualification Test 认证测验

R. Receiver 终端解码器

RA Reliability Analysis 可靠性分析

RAC Random Access Control 随机存取控制

RACE Rapid Automatic Checkout Equipment 快速自动检查设备

RAD Rapid Application Development 快速应用程序发展法

RADAR Radio Detection And Ranging 无线电侦察和测距

RADIUS Remote Authentication Dial-In User Service 遠端撥接認證服務,远程身份验证拨入用户服务

RADSL Rate Adapted Digital Subscriber Line 速率調整式數位用戶線路

RAI Radio Altimeter Indicator 无线电高度指示器

RAID Redundant Array of Inexpensive Disks 廉价磁盘冗余阵列

RAMDAC Random Access Memory Digital To Analog Converter 随机存储器数/模转换器

RAN Remote Access Node 遠端接取節點

RAR Read After Read 读后读

RARP Reverse Address Resolution Protocol 反向地址转换协议