RA

= Random Access,随机存取;

= Rational Number, 有理数;

= Read Accumulator, 读累加器(指令);

= Read Amplifier, 读出放大器，读放;

= Real Address, 实地址;

= Receiving Amplifier, 接收放大器;

= Receiving Attenuation, 接收衰减;

= Record Address, 记录地址