Classification
600 - Technology
99
333 - Economics of land & energy
90
700 - The arts; fine & decorative arts
85
620 - Engineering & allied operations
75
000 - Computer science, information & general works
68
610 - Medicine & health
65
900 - History & geography
62
330 - Economics
60
380 - Commerce, communications & transportation
57
363 - Other social problems & services
38
580 - Plants (Botany)
30
551 - Geology, hydrology & meteorology
18
140 - Specific philosophical schools
17
320 - Political science
16
340 - Law
16
500 - Natural sciences & mathematics
15
576 - Genetics & evolution
15
630 - Agriculture & related technologies
13
540 - Chemistry & allied sciences
10
414 - Phonology & phonetics
9
530 - Physics
9
720 - Architecture
9
400 - Language
8
304 - Factors affecting social behavior
7
658 - General management
6
370 - Education
5
581 - Specific topics in natural history
5
100 - Philosophy & psychology
4
612 - Human physiology
4
800 - Literature & rhetoric
4
300 - Social sciences
3
360 - Social problems & services; associations
2
657 - Accounting
2
120 - Epistemology, causation & humankind
1
301 - Sociology & anthropology
1
336 - Public finance
1
362 - Social welfare problems & services
1
410 - Linguistics
1
590 - Animals (Zoology)
1
615 - Pharmacology & therapeutics
1
625 - Engineering of railroads & roads
1
650 - Management & auxiliary services
1
770 - Photography, photographs & computer art
1
780 - Music
1