Windows，Mac OS X和Linux用什么语言编写?

我只是想知道谁知道Windows，Mac OS X和Linux由什么编程语言组成，以及OS的每个部分使用什么语言(即:内核，插件体系结构，GUI组件等).

I was just wondering who knows what programming languages Windows, Mac OS X and Linux are made up from and what languages are used for each part of the OS (ie: Kernel, plug-in architecture, GUI components, etc).

我假设每种语言都有多种语言，显然我知道Linux内核是用C编写的.

I assume that there are multiple languages for each and obviously I know the Linux kernel is written in C.

我在这里完全猜测Mac OS X包含很多Objective-C代码，因为它是Apple的NeXT派生的语言.

I'm totally guessing here that Mac OS X contains a lot of Objective-C code as it is Apple's language derived from NeXT.

Windows，我听说包含C，C ++和Intel Assembly. Linux或Mac OS是否包含任何汇编代码?

Windows, I have heard contains C, C++ and Intel Assembly. Do Linux or Mac OS contain any Assembly code?

还有，OS开发人员是否使用诸如Ruby，Python等脚本语言来编写OS的某些部分的脚本?操作系统的哪些部分将用每种语言编写?

Also, are there scripting languages like Ruby, Python, etc used by the OS developers for scripting parts of the OS? What parts of the OS would be written in each language?