Classification
600 - Technology
44
700 - The arts; fine & decorative arts
38
620 - Engineering & allied operations
37
900 - History & geography
29
333 - Economics of land & energy
24
000 - Computer science, information & general works
21
330 - Economics
21
610 - Medicine & health
18
320 - Political science
17
140 - Specific philosophical schools
15
363 - Other social problems & services
15
340 - Law
10
576 - Genetics & evolution
9
380 - Commerce, communications & transportation
8
370 - Education
6
551 - Geology, hydrology & meteorology
6
630 - Agriculture & related technologies
6
400 - Language
5
580 - Plants (Botany)
5
414 - Phonology & phonetics
4
500 - Natural sciences & mathematics
4
820 - English & Old English literatures
4
304 - Factors affecting social behavior
3
720 - Architecture
3
530 - Physics
2
581 - Specific topics in natural history
2
300 - Social sciences
1
301 - Sociology & anthropology
1
360 - Social problems & services; associations
1
368 - Insurance
1
410 - Linguistics
1
540 - Chemistry & allied sciences
1
577 - Ecology
1
614 - Incidence & prevention of disease
1
615 - Pharmacology & therapeutics
1
658 - General management
1
770 - Photography, photographs & computer art
1