0 abbreviation for self-addressed stamped envelope: an envelope with a stamp and your name and address on it that you send inside another envelope to an organization when you want a reply -- (贴足邮资写明姓名地址的)回邮信封(self-addressed stamped envelope的缩写)
Please enclose an SASE with your application. 请随申请书附上贴足邮资写明姓名地址的回邮信封。