Classification
320 - Political science
2
004 - Data processing & computer science
1
149 - Other philosophical systems
1
306 - Culture & institutions
1
330 - Economics
1
363 - Other social problems & services
1
410 - Linguistics
1
516 - Geometry
1
523 - Specific celestial bodies & phenomena
1
530 - Physics
1
536 - Heat
1
610 - Medicine & health
1
612 - Human physiology
1
620 - Engineering & allied operations
1
621 - Applied physics
1