It does, not only the most wanted job of cleaning system RAM by closing unused tasks, but with many more features.

它，而不是通过关闭未使用的清洁任务的系统内存只有最想要的工作，但还有更多的功能。

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The whole OS is small enough to run directly from system RAM, so applications start quickly and respond to user input instantly.

整个操作系统足够小到能够直接在系统内存中运行，所以程序启动很快，而且对用户输入的响应也很积极。

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The system has 256 MB RAM, expandable to 2GB.

这个系统内存 256 兆字节，可扩充到 2 千兆字节。

《牛津词典》

Only the operating system has controlling of byte zero NULL in the computer's RAM and so if a function ever returns null, aka zero, well, something must have gone wrong because that can't possibly belong to me that memory because by human convention zero is owned by the operating system; not by a program I wrote.

只用操作系统在内存中能够控制,字节0，并且如果一个函数返回，或者说0，好的，可能出错了,因为那可能是不属于我的内存,因为惯例上，0是由操作系统拥有的,而不是由我的程序拥有的。

哈佛公开课 - 计算机科学课程节选

Now that's changing the more years that pass the more of you have 64-bit computers and the more servers have many, many gigabytes of RAM and so you need actually 64-bits, but for now let's assume a common system whereby a pointer just by definition of the homework is 32 bits.

现在计算机也在改变，也有更多的人,使用64位的计算机，更多的服务器有很多，很多G的内存，那样你就需要64位的，现在我们假设通常的系统中,根据家庭作业所定义的，一个指针为32位。

哈佛公开课 - 计算机科学课程节选

Example.. 512mb of system ram to a console developer is like 1gb of system ram to a pc developer.

FORBES: 'Halo 4' Is Easily One Of The Best Looking Xbox 360 Games Of All Time

Notably, there's no option to configure the system with additional RAM.

ENGADGET: Look and feel

Powered by Intel's reliable high performance desktop chipset, this system supports up to 16GB of DDR3 1333 RAM and up to 1TB of data storage.

ENGADGET: MediawavePC's MW6110 is a multipurpose Intel Core i7-supporting media player