Classification
330 - Economics
550 - Earth sciences
610 - Medicine & health
900 - History & geography
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
320 - Political science
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1
720 - Architecture
1