Classification
330 - Economics
9
320 - Political science
8
500 - Natural sciences & mathematics
5
520 - Astronomy & allied sciences
5
820 - English & Old English literatures
5
910 - Geography & travel
4
300 - Social sciences
3
800 - Literature & rhetoric
3
333 - Economics of land & energy
2
510 - Mathematics
2
550 - Earth sciences
2
551 - Geology, hydrology & meteorology
2
577 - Ecology
2
631 - Techniques, equipment & materials
2
003 - Systems
1
005 - Computer programming, programs & data
1
006 - Special computer methods
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
305 - Social groups
1
340 - Law
1
341 - Law of nations
1
345 - Criminal law
1
364 - Criminology
1
501 - Philosophy & theory
1
515 - Analysis
1
516 - Geometry
1
530 - Physics
1
547 - Organic chemistry
1
616 - Diseases
1
617 - Surgery & related medical specialties
1
621 - Applied physics
1
641 - Food & drink
1
664 - Food technology
1
700 - The arts; fine & decorative arts
1
791 - Public performances
1
900 - History & geography
1