Depends on how define OS 'DSL', 'os' just metadata bindings for hardware / software * embedded os : https://blog.felgo.com/embedded/embedded-operating-systems

Depends on how define OS 'DSL', 'os' just metadata bindings for hardware / software * embedded os : https://blog.felgo.com/embedded/embedded-operating-systems https://blog.felgo.com/embedded/embedded-operating-systems * OS modules / daemons : ebpf / systemd * ebpf : https://news.ycombinator.com/item?id=33489935 https://news.ycombinator.com/item?id=33489935 ; https://news.ycombinator.com/item?id=33462031 https://news.ycombinator.com/item?id=33462031 * tiny core : https://en.wikipedia.org/wiki/Tiny_Core_Linux https://en.wikipedia.org/wiki/Tiny_Core_Linux * yocto : https://www.yoctoproject.org/ https://www.yoctoproject.org/ * 'bootloaders' don't have to just 'load an os' https://wiki.archlinux.org/title/syslinux https://wiki.archlinux.org/title/syslinux * uefi : https://askubuntu.com/questions/651902/what-is-the-difference-between-grub-and-syslinux https://askubuntu.com/questions/651902/what-is-the-differenc... * OS device drivers for external devices such as printers (post script printers) * OS api's