From the footnotes:
> In bare-metal embedded systems or inside the operating system, it’s not unusual to manually break computation into state machines, driven by interrupts.
Although not the topic of TFA, in fact, the footnotes that this is "a whole different ball game." Does anyone have any good source for this aspect of 'low-level'/OS development? I'm more than capable of chasing down sources from a more high level introduction or overview, so anything would be helpful. This concept seems like it may just be a more pragmatic description of embedded/OS development than what I've read previously.