> For the complete documentation index, see [llms.txt](https://dhrubo.gitbook.io/programming-with-js/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dhrubo.gitbook.io/programming-with-js/pre-concept.md).

# Pre-concept

<figure><img src="https://2695988990-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FamN8cEfvgdRmyvmefSSY%2Fuploads%2F0HcEEW2VUwwn4T3cCqGq%2Fhow_computer_understood.PNG?alt=media&amp;token=96d18013-af10-45f7-b26b-39f65a74a3fc" alt=""><figcaption></figcaption></figure>

<figure><img src="https://2695988990-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FamN8cEfvgdRmyvmefSSY%2Fuploads%2Fgc4FCTzklveh5fnbrO76%2Fcode%20to%20source%20code.PNG?alt=media&amp;token=4b65f0fc-00c6-43b2-b6a3-7bd62279c4ae" alt=""><figcaption></figcaption></figure>

<figure><img src="https://2695988990-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FamN8cEfvgdRmyvmefSSY%2Fuploads%2FVivRbgUmCuNawqqaxBhV%2Fsource%20code%20to%20machine%20code.PNG?alt=media&amp;token=009e9033-fec2-41fb-9716-b1724221ca99" alt=""><figcaption></figcaption></figure>

<figure><img src="https://2695988990-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FamN8cEfvgdRmyvmefSSY%2Fuploads%2F6bokESRXZ26AYqITaaJw%2Fhwo%20compiler%20work.PNG?alt=media&amp;token=6667af14-9ea7-42ad-a1dd-5edb9d5660d0" alt=""><figcaption></figcaption></figure>