PN

= Packet Number,包编号;

= Page Number, 页面编号;

= Parts Number, 部件号，元件号;

= Perceived Noise decibels, 可闻噪声分贝数;

= Positive-Negative, 正负;

= Processor Number, 处理机号;

= Programmable Network, 可编程网络;

= PseudoNoise, 伪噪声