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。

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

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但是，由于其专用特性，整个软件栈(包括操作系统)都是高度定制的，或者说，它的规模是针对预定用途适当设置的。

However, due to its purpose-built nature, the entire software stack (including the operating system) is highly customized or "right-sized" for its intended use.

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您可以从不需要基础操作系统的专用虚拟机(virtual machine, VM)软件中做出选择，并且可以一次运行多个服务器。

You can choose from dedicated virtual machine (VM) software that requires no base operating system, and you can run several servers at once.

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