How do you get thrust power?

I'm curious, how exactly does one obtain thrust power? Could you elaborate on the various methods or technologies used to generate this type of force? Is it a mechanical process, or does it involve some form of energy conversion? I'm particularly interested in understanding the principles behind how thrust is generated, and how it's applied in various fields such as aerospace engineering and transportation. Could you provide a comprehensive explanation, perhaps with some examples to illustrate your points?