A system or sometimes known as an OS backup basically creates a bootable backup of a the operating system structures necessary to rebuild the operating system.

系统——或有时称为OS——备份主要创建一个可引导的操作系统结构备份，这是重新构建操作系统所必需的。

youdao

A virtual machine is one operating system (OS) that is being managed by an underlying control program allowing it to appear to be multiple operating systems.

虚拟机是一个由底层控制程序管理的操作系统(OS)，这让它看起来像多个操作系统。

youdao

In this model, the host runs a single OS kernel as its core and exports operating system functionality to each of the guest operating systems.

在这种模型中，宿主运行单一OS内核并向每个访客操作系统导出操作系统功能。

youdao

And if you've ever heard the word driver software that you install in your computer so that your computer, your operating system, Windows or Mac OS, knows how to talk to that piece of hardware, it's that driver software that then empowers the operating systems to send those commands as well, up, the data is laid out on the disk.

并且如果你听说过安装到,电脑中的驱动软件这个词的话，你的操作系统，比如Windows或者是苹果操作系统，通过这个驱动软件我们的电脑，才能知道如何与这个硬件进行通信,正是因为这个驱动软件，操作系统才能根据数据，左右移动的指令来读取磁盘里的数据。

哈佛公开课 - 计算机科学课程节选

Apple is promising a sneak peak at the next version of its OS X operating system.

FORBES: Live Blog: Apple's "Back to the Mac" Event [Updated]

Ten years ago, Apple introduced the first major release of its OS X operating system, Cheetah.

FORBES: Coming Soon: OS X, Ocelot? Apple Running Out Of Cats

And Schiller likely will tout the latest version of Apple's OS X operating system, Snow Leopard, due this year.

FORBES: Magazine Article