Classification
600 - Technology
610 - Medicine & health
620 - Engineering & allied operations
900 - History & geography
190
700 - The arts; fine & decorative arts
174
333 - Economics of land & energy
120
363 - Other social problems & services
90
000 - Computer science, information & general works
85
580 - Plants (Botany)
69
630 - Agriculture & related technologies
69
330 - Economics
56
140 - Specific philosophical schools
47
380 - Commerce, communications & transportation
37
540 - Chemistry & allied sciences
24
370 - Education
22
720 - Architecture
21
500 - Natural sciences & mathematics
19
551 - Geology, hydrology & meteorology
19
576 - Genetics & evolution
18
100 - Philosophy & psychology
17
320 - Political science
15
414 - Phonology & phonetics
15
170 - Ethics
11
300 - Social sciences
10
400 - Language
9
581 - Specific topics in natural history
9
658 - General management
9
340 - Law
8
530 - Physics
7
800 - Literature & rhetoric
7
410 - Linguistics
6
612 - Human physiology
6
304 - Factors affecting social behavior
4
361 - Social problems & social welfare in general
4
615 - Pharmacology & therapeutics
4
657 - Accounting
3
780 - Music
3
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
360 - Social problems & services; associations
1
364 - Criminology
1
550 - Earth sciences
1
660 - Chemical engineering
1
791 - Public performances
1