320 - Political science 330 - Economics 3 333 - Economics of land & energy 3 363 - Other social problems & services 380 - Commerce, communications & transportation 576 - Genetics & evolution 600 - Technology 700 - The arts; fine & decorative arts 000 - Computer science, information & general works 1 100 - Philosophy & psychology 1 140 - Specific philosophical schools 1 551 - Geology, hydrology & meteorology 1 610 - Medicine & health 1 620 - Engineering & allied operations 1 657 - Accounting 1 658 - General management 1 900 - History & geography 1