Calculator就是组件目录。

Calculator is the component directory.

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从一台计算机的便利性，用户将能够建立一个RCS的牧师C组件目录号。

From the convenience of a computer, a user will be able to build a catalog number of an RCS Rev.

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如果一个工程师需要一个特别的组件来完成工作，他可以去翻翻组件目录，找到符合他要求的组件然后向供货商下订单。

If an engineer wants a particular component for a job, he can go to a catalogue, find a widget with the right parameters and order it from a supplier.

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