Next, we installed the main operating system using the Fedora 10 x86_64 release distribution.

接下来，我们将使用Fedora 10 x86_64发行版安装主操作系统。

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In contrast, AIX is broken down into four main operating system levels: version, release, technology level (TL), and service pack (SP).

相比之下，AIX分为四个主要的操作系统级别：版本、发行版、技术级(TL)和服务包(SP)。

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A program that controls the transfer of data to and from a hard or floppy disk. Frequently combined with the main operating system.

一种控制计算机与磁盘或软盘之间数据传送的程序，通常与主操作系统结合在一起。

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If more horsepower is needed, then the user can quickly switch into the main operating system, which Cloud continues to load in the background.

ECONOMIST: Google goes in search of an instant operating system

You upgrade the main operating system in your home so that you can gain greater functionality and speed and more features for your phone, PC, TV, etc.

CNN: Home, sweet networked home

Microsoft is hated chiefly because it represents the opposite model, proprietary software, and because its operating system, Windows, is the main rival to Linux, the best-known open-source software today.

ECONOMIST: Computer security