Simplify the following text for a Grade 11 native English-speaking person.
Original: ; Systems science Systems sciences are scientific disciplines partly based on systems thinking such as Chaos theory , Complex systems , Control theory , Cybernetics , Sociotechnical systems theory , Systems biology , Systems ecology , Systems psychology and the already mentioned Systems dynamics , Systems engineering and Systems theory .
Simplified: Types of systems science are systems theory , cybernetics and chaos theory , and all kinds of similar sciences .