Lets run though some examples:
Note though that usage differs a lot.
Electrical Engineering: General power, motors, generators, transmission lines ...
Electronic Engineering: Transistors, ICs, signal processing ...
Computer Engineering: Adders, multipliers, CPU design ... (to an extent a special case of Electronic Engineering)
Computer Science:: Algorithms, Machine Learning (computer science is no more the study of computers than chemistry is the study of test tubes)
Software Engineering: How to make computer programs.
Computational Science: Doing science (eg biology) making use of computers (eg for simulations).
Mechatronic Engineering: combined mechanical and electronic engineering. Robots.
But these definitely overlap, also some things are poorly defined (Eg is computer vision CS or software eng?).
I have a degree in Electrical and Electronic Engineering, from my universities Electrical, Electronic and Computer Engineering department.
Within which I took units in Electrical, Electronic, Mechatronic, Software, and Computer engineering.
I also have a degree in computer and mathematical science, from the Computer Science and Software Engineering department. Where about half my units were on software engineering, and where people had the option to take mechatronic and computer engineering units.