The etymology of cybyernetics has already correctly been given as κυβερνητικός (kubernētikós), the Greek sailor exerting control over his environment, and that is the true meaning of the field. It is about intelligent systems of control, nothing more, and the essence of this is a very simple concept: feedback. Like the Greek sailor, it is not enough to exert force to achieve will - the results of the exertion must be perceived, and compared with the desired outcome. If the sailor finds he is veering to the right due to winds or currents, he must apply change using the rudder in order to maintain his course. Thus his actions in this instant are predicated on the results of his actions in the preceding instant(s); what is happening influences what will happen next.
https://english.stackexchange.com/questions/169114/what-does-cyber-actually-mean
https://www.bbc.com/news/magazine-35765276
https://blog.oup.com/2015/03/cyber-word-origins/
