As UmbertoNoEco says, CPUs absolutely are actuators controlling flow of electrons. In fact a single transistor is both a sensor and actuator. In fact you can

As UmbertoNoEco says, CPUs absolutely are actuators controlling flow of electrons. In fact a single transistor is both a sensor and actuator. In fact you can use them to do things they were not designed to do like trough row hammer: https://en.wikipedia.org/wiki/Row_hammer https://en.wikipedia.org/wiki/Row_hammer CPUs can also detect things like collisions with cosmic rays. CPUs just can't produce macroscopic forces relevant on human scale.