哪位能弄个常用缩略词汇解释？what is FP,AD,RD and PD?

and others I read here.
Sometimes I real don't know the meaning.

所有跟帖： 

• Finger Print, Approved date, Received Date, Priority Date -sleepbear- ♂ (74 bytes) () 07/25/2007 postreply 05:56:58

• 移民缩语词汇表 -taotaomao- ♀ (72 bytes) () 07/25/2007 postreply 06:47:26