Classification
340 - Law
46
820 - English & Old English literatures
36
320 - Political science
29
330 - Economics
29
900 - History & geography
27
620 - Engineering & allied operations
12
230 - Christianity & Christian theology
8
300 - Social sciences
8
363 - Other social problems & services
8
616 - Diseases
8
617 - Surgery & related medical specialties
7
346 - Private law
6
150 - Psychology
5
170 - Ethics
5
200 - Religion
5
304 - Factors affecting social behavior
5
341 - Law of nations
5
610 - Medicine & health
5
970 - History of North America
5
100 - Philosophy & psychology
4
301 - Sociology & anthropology
4
342 - Constitutional & administrative law
4
364 - Criminology
4
370 - Education
4
576 - Genetics & evolution
4
700 - The arts; fine & decorative arts
4
006 - Special computer methods
3
260 - Social & ecclesiastical theology
3
380 - Commerce, communications & transportation
3
510 - Mathematics
3
800 - Literature & rhetoric
3
910 - Geography & travel
3
940 - History of Europe
3
003 - Systems
2
140 - Specific philosophical schools
2
240 - Christian moral & devotional theology
2
250 - Christian orders & local church
2
290 - Other religions
2
305 - Social groups
2
338 - Production
2
520 - Astronomy & allied sciences
2
530 - Physics
2
531 - Classical mechanics; solid mechanics
2
570 - Life sciences; biology
2
571 - Physiology & related subjects
2
580 - Plants (Botany)
2
590 - Animals (Zoology)
2
612 - Human physiology
2
615 - Pharmacology & therapeutics
2
629 - Other branches of engineering
2
more ...