600 - Technology 610 - Medicine & health 700 - The arts; fine & decorative arts 140 - Specific philosophical schools 5 330 - Economics 4 580 - Plants (Botany) 3 170 - Ethics 2 320 - Political science 2 200 - Religion 1 338 - Production 1 340 - Law 1 380 - Commerce, communications & transportation 1 620 - Engineering & allied operations 1