330 - Economics 4 720 - Architecture 2 000 - Computer science, information & general works 1 140 - Specific philosophical schools 1 300 - Social sciences 1 320 - Political science 1 350 - Public administration & military science 1 361 - Social problems & social welfare in general 1 370 - Education 1 500 - Natural sciences & mathematics 1 600 - Technology 1 610 - Medicine & health 1 657 - Accounting 1 700 - The arts; fine & decorative arts 1