“POP”是什么意思？

POP

(1) (Point of Presence, also Post Office Protocol)电话接入网[站]点；邮局协议,用于电子邮件的接收

(2) =Printing Out Paper摄(利用光照直接显影的)印相纸;

(3) Process Optimization Program 最佳操作程序

(4)(=popular)流行

(5)砰地一声响；劈啪地响