# Windows Coding?

**URL:** <https://boards.straightdope.com/t/windows-coding/171163>\
**Category:** Factual Questions\
**Created:** [April 25, 2003, 6:18pm UTC](https://boards.straightdope.com/t/windows-coding/171163 "2003-04-25T18:18:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Nomadic\_One](https://avatars.discourse-cdn.com/v4/letter/n/858c86/32.png) [@Nomadic\_One](https://boards.straightdope.com/u/Nomadic_One)\
**Post date:** [April 25, 2003, 6:18pm UTC](https://boards.straightdope.com/t/windows-coding/171163/1 "2003-04-25T18:18:32Z")

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Can anyone tell me what windows xp is coded in. The actual programming language its writen in. Even google couldnt tell me the answer to this one. thanks

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**Author:** ![Cerowyn](https://avatars.discourse-cdn.com/v4/letter/c/82dd89/32.png) [@Cerowyn](https://boards.straightdope.com/u/Cerowyn)\
**Post date:** [April 25, 2003, 6:37pm UTC](https://boards.straightdope.com/t/windows-coding/171163/2 "2003-04-25T18:37:05Z")

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The Windows NT-kernal code base (which includes NT, 2000 and XP) is written mostly in C. The HAL (hardware abstraction layer) probably has at least some assembler.