Preferred Drug List首选药物名单 Page Description Language页面描述语言 Pregnancy Disability Leave妊娠残疾离开 Program Design Language程序设计语言 Process Design Language程序设计语言 Page Digital Language页面描述语言（打印机） Professional Development Leave职业发展离开 Plutonium Discard Limit钚丢弃的限制 Process Definition Language流程定义的语言 Purification Development Laboratory净化研发实验室 Parts Design List (used in aerospace by mechanical designers and engineers)部件设计列表(用于航天用机械的设计师和工程师) Preliminary Design Language初步设计语言 Price to Be Determined Later要确定价格 Programmable Design Language可编程序设计语言 Portable Data Logger便携式数据日志记录器