As you found, the BUSINESS.DSA file and BUSINESS.SF files share the same base file name, with different extension names.

如您所见，BUSINESS . DS A文件和BUSINESS . SF文件使用相同的基文件名，但扩展名不同。

youdao

The office network allows users to share files and software, and to use a central printer.

办公室网络让用户共享文件和软件，并使用中央打印机。

《牛津词典》

If my word processor and your word processor can both open the same files, I can share documents with you easily.

如果我的文字处理程序和您的文字处理程序都可以打开相同的文件，那么我就可以轻松地与您共享文件。

youdao

But there're others, backslash T. Folks in the consulting world and finance world like to share files in Excel format or in Text format that looks like Excel.

还有一些其他的转义字符，譬如\t，顾问界，财政界的,人们很喜欢用Excel文档,或类似于Excel的文本文件。

哈佛公开课 - 计算机科学课程节选

Sharing files via a cloud system is convenient, of course, but remember that anyone you share files with can share those same files with another party that you do not know and have not specifically given access to.

FORBES: The Cloud's Not-So-Secret Weak Link

All of these services also allow you to share files and folders, which can be great for co-workers who collaborate on projects or family and friends who want to share photos, videos and other files.

FORBES: Cloud Storage Solutions for Laptops with Solid State Drives

Chatter will also integrate with Microsoft Sharepoint allowing users to to share files in Sharepoint using Chatter.

FORBES: Salesforce.com's Chatter Aims To Be Facebook Of The Enterprise