备忘录有时也称为便函，英文全称为Memorandum，缩写为Memo，是企业、商务机构内部同级之间、上下级之间的书面交际形式。备忘录用于传递各种即时消息，备忘或保留准备将来用的非正式的信息，帮助或唤起记忆的记录。
备忘录的主要分类
备忘录可以按传达方式分类。一般来说，备忘录有4种类型。
Memos can be classified according to their circulation way, Generally speaking,there are four types of memos.
1.向高层(To Upper Management)
这种备忘录是作为一种报告提交给上层管理人员。
This kind of memo is acting as a report and goes to the upper management.
2.向隶属部门(To Divisions Affiliated)
这种备忘录通常传达上级管理人员的指示。
This type of memo usually carries instructions from the upper management.
3.向所有员工(To All the Staff)
一般来说，这种备忘录起到通知或公告的作用。
Generally speaking, this sort of memo works as a notice or bulletin.
4.向本部门内或外的同事(To colleagues in or outside one's own depart-ment)
这种备忘录可以看作是信息交流。
This kind of memo can be regarded as information exchanging.
（本文内容根据网络资料整理，出于传递更多信息之目的，不代表连连国际赞同其观点和立场）
