Classification
820 - English & Old English literatures
56
330 - Economics
29
616 - Diseases
27
551 - Geology, hydrology & meteorology
26
577 - Ecology
22
900 - History & geography
21
610 - Medicine & health
18
320 - Political science
16
700 - The arts; fine & decorative arts
15
333 - Economics of land & energy
14
940 - History of Europe
13
340 - Law
11
570 - Life sciences; biology
10
630 - Agriculture & related technologies
10
000 - Computer science, information & general works
9
363 - Other social problems & services
9
780 - Music
9
910 - Geography & travel
8
140 - Specific philosophical schools
7
571 - Physiology & related subjects
7
579 - Microorganisms, fungi & algae
7
600 - Technology
7
300 - Social sciences
6
301 - Sociology & anthropology
5
304 - Factors affecting social behavior
5
500 - Natural sciences & mathematics
5
005 - Computer programming, programs & data
4
520 - Astronomy & allied sciences
4
576 - Genetics & evolution
4
580 - Plants (Botany)
4
614 - Incidence & prevention of disease
4
620 - Engineering & allied operations
4
930 - History of ancient world to ca. 499
4
932 - Egypt to 640
4
004 - Data processing & computer science
3
200 - Religion
3
270 - History of Christianity & Christian church
3
306 - Culture & institutions
3
331 - Labor economics
3
338 - Production
3
380 - Commerce, communications & transportation
3
510 - Mathematics
3
530 - Physics
3
550 - Earth sciences
3
572 - Biochemistry
3
615 - Pharmacology & therapeutics
3
621 - Applied physics
3
624 - Civil engineering
3
631 - Techniques, equipment & materials
3
230 - Christianity & Christian theology
2
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