PID is most precious in Process Control & Instrumentation.
If you have more applications and willing to share ... !
Have a good visit ... Jean.

Cubic solver Algo Style.sm (30 KiB) downloaded 58 time(s).
Cubic solver Lagrange canonic.sm (136 KiB) downloaded 54 time(s).
Cubic solver PID.sm (145 KiB) downloaded 50 time(s).