ＰＯＰ（ｐｏｉｎｔｏｆｐｒｅｓｅｎｃｅ）原为计算机名词，译为“显示点”或“存在点”，原指显示点或内存指示，也用来表示放置某些设备的地点。随着１９８４年初美国电信经营体制的改革，电信行业给ＰＯＰ赋以新的含义，将各长途电信公司在改组后的市话局内设置的长途接人? POP (pointofpresence) was originally a computer noun, translated as “display point” or “point of presence”, the original point of view or memory indicator, also used to indicate the place where some of the equipment. With the reform of the telecom system in the United States in early 1984, the telecommunications industry gave a new meaning to POPs and set up long-distance access to long-distance telecommunications companies in the reorganized local telephone exchanges.