文中论述了该系统的结构、邮递服务协议、邮递方式、信箱的管理及信件的保密和存取控制手段等问题。

The structure of the system, mail service protocols, mode of messaging, allocation of mailboxes as well as personal security for authentication and access control measures are discussed in this paper.

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一个文件管理系统是提供对用户服务和文件使用方面的一组系统软件，包括文件的访问，目录维护和存取控制。

A file-management system is a set of system software that provides services to users and applications in the use of files, including file access, directory maintenance, and access control.

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文件传送存取和管理服务FTAMS ？

File Transfer Access and management Services?

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