I-485 and OS155A, thanks

来源: 于 2006-06-24 08:57:40 [旧帖] [给我悄悄话] 本文已被阅读：次

What is I-485? and what is OS155A? what is the difference?
After the I-485 approved, the I-485 will be changed to OS155A? thanks for answer.