How low-level do you want to go? Jack Ganssle's The Embedded Muse is excellent if you are interested in embedded systems and microcontrollers: http://www.ganss

How low-level do you want to go? Jack Ganssle's The Embedded Muse is excellent if you are interested in embedded systems and microcontrollers: http://www.ganssle.com/tem-back.htm http://www.ganssle.com/tem-back.htm I also like Hackaday for hardware hacks (not necessarily just low-level stuff, but you can filter based on tags): https://hackaday.com/ https://hackaday.com/ Alternatively, mailing lists for big open-source projects like the Linux Kernel Mailing List, PostgreSQL, or ffmpeg-devel are very low-level (operating systems, database internals, audio/video codecs, and hardware/firmware discussions), but require a lot of technical background to understand: - https://lkml.org/ https://lkml.org/ - https://wiki.postgresql.org/wiki/Mailing_Lists https://wiki.postgresql.org/wiki/Mailing_Lists - https://ffmpeg.org/contact.html#MailingLists https://ffmpeg.org/contact.html#MailingLists