*[Programming from the Ground Up](https://download-mirror.savannah.gnu.org/releases/pgubook/ProgrammingGroundUp-1-0-booksize.pdf) - Jonathan Bartlett (PDF)
*[Programming from the Ground Up](https://download-mirror.savannah.gnu.org/releases/pgubook/ProgrammingGroundUp-1-0-booksize.pdf) - Jonathan Bartlett (PDF)
*[Software optimization resources](http://www.agner.org/optimize/) - A. Fog
*[Software optimization resources](http://www.agner.org/optimize/) - A. Fog
*[The Art of Assembly Language Programming](https://web.archive.org/web/20120525102637/http://maven.smith.edu/~thiebaut/ArtOfAssembly/artofasm.html)
*[Wizard Code, A View on Low-Level Programming](https://web.archive.org/web/20170712195930/http://vendu.twodots.nl/files/wizardcode4.pdf) - Tuomo Tuomo Venäläinen (PDF)
*[x86-64 Assembly Language Programming with Ubuntu](http://www.egr.unlv.edu/~ed/x86.html) - Ed Jorgensen (PDF)
*[x86-64 Assembly Language Programming with Ubuntu](http://www.egr.unlv.edu/~ed/x86.html) - Ed Jorgensen (PDF)