The main system functions file upload and download, online document editing, deletion of documents, user management, and other functions.

系统实现的主要功能有：文件的上传与下载，在线文件编辑，文件删除，用户管理等功能。

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Indeed, Huddle has even noticed people trading up from free products because its document editing in multiple "workspaces" online offer more options and an impressively simple design.

确实，Huddle甚至要人们放弃免费软件而出钱购买自己的产品，原因是它具有在网上多个工作空间进行文件编辑的功能，提供了更多选择，设计简洁。

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For more information on particular Settings, you can refer to the online documentation or consult the "Editing SGML with Emacs and PSGML" document included with PSGML.

有关特殊设置的更多信息，请参考在线文档或查阅PSGML中的“Editing SGML with Emacs and PSGML”文档。

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Could they not use videoconferencing, webconferencing, remote desktop access, online document editing, etc. or other tools?

FORBES: Can Consultants Save Us Money By Doing More Work Remotely?