The 200-299 is the Religion section in the Dewey Decimal System. It is where you will find information about what people believe about god(s), and world religions.
Section 320-329 of the Dewey Decimal System is where you will find information about how to be a good citizen and what others have done to improve life for others.
The 600-699 is the Technology section of the Dewey Decimal System. It is where you will find information about how humans have developed things for our own use.