Operating system specialists focus on the operating system layer.

操作系统专家主要关注操作系统层。

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While those customizations are important, customization of the operating system layer is also often required.

虽然这些定制都非常重要，但是操作系统层的定制也是一个常见的需求。

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The architecture has three layers which include operating system layer, middleware layer and application layer.

该方案采用操作系统层、中间层和应用程序层的三层结构。

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Cloud may be a workable approach, however, if only one of these elements (hardware, operating system, or application layer) are based on custom technology.

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On Thursday Facebook founder Mark Zuckerberg announced Facebook Home, a family of apps that would sit as a integrated layer on the Android operating system.

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The short-lived Fusion Garage Grid10 tablet also created such a distinct layer atop Android that the company dubbed it a new operating system: GridOS. However, while the company dissolved before any GridOS apps could be released, the tablet could run a wide range of Android apps downloaded from Amazon's Android app store.

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