RP2040 supports external crystal oscillators for precision applications and ships with one on the reference board, the internal ring oscillator is only recommended for low precision, low cost applications.
I built a tool https://github.com/simmsb/container-per-ip that manages spinning up containers such that each source IP gets it's own container, and automates shutting down containers after a period of inactivity.
It's main purpose is for running challenges of jeopardy style ctfs.
Afaik: At some point in the history of the language there would(?) have been rules for these nouns, but not today.