PPabbr.包裹邮递（=Parcel Post)abbr.过去分词（=past participle）abbr.邮资付讫的(=postpaid)n.一种中文文件交换软件和通讯软件PPDabbr.已付的(=postpaid)abbr.预付的(=prepaid)abbr.程序设计指示(=Program Planning Directives)