Specific services include systems integration, proprietary software development, systems and software testing, data management, and systems documentation.

具体服务包括系统集成，专用软件开发，系统和软件测试，数据管理和系统文件。

youdao

The programs are available to all to use, manipulate, change and redistribute, without the proprietary interests that normally control software development.

CNN: Celebrated freeware OS Linux grows up