Unlike hardware, which has several categories, software only has one category: computer applications.

不像硬件，其中有几类，软体，不但一类是：计算机应用。

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Home and business security systems and certain computer software and hardware fall into this category.

家用和商用安全系统及某些计算机软件和硬件都属于这类。

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Third, the hardware category.

第三种，硬件类。

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Third, the hardware category.

第三种，硬件类。

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