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Fifteen years ago if you wanted to write an application that would run on over 90% of the world's personal computers, you only needed to target one OS.

十五年前你想写个在全世界90%个人电脑上应用的程序，只需你针对一种系统开发。

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Given the cost associated with building an OS like Linux, one wonders if proprietary companies will ever go it alone again.

考虑到与建立一个类似Linux的操作系统相关的费用，人们不禁要问，究竟这些控股公司是否又要单干了。

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Now, in the world of Linux and Unix more generally, both of which are our operating systems that had been around for many, many years, Mac OS is based on one of-- one version thereof.

在Linux和Unix里更广泛，对了，这两个都是历史悠久的,操作系统，就连Mac操作系统,都是基于它的一个版本设计出来的。

哈佛公开课 - 计算机科学课程节选

As ASUS' dual-OS prototype all-in-one is the only (sort of) tablet we've seen with roughly that many inches, we assume the company is getting paperwork done before a proper launch at CES 2013.

ENGADGET: Mysterious ASUS P1801-T visits the FCC, might be the finished Transformer AiO (updated)

We initially installed the router using an Apple (nasdaq: AAPL - news - people ) PowerMac G4 running Mac OS X, but we also connected a Windows-based notebook and another Mac, this one a Powerbook also running OS X, to the router via Ethernet cables.

FORBES: Wireless Networking Gets Easy

In fact, Firefox OS is one of a handful of other web-based mobile platforms launching this year, including Tizen from Samsung and Intel, Sailfish from Jolla and Ubuntu from Canonical (in 2014).

FORBES: Mozilla Launches Firefox OS For Mobile, Challenging Apple And Google With The Open Web