Classification
000 - Computer science, information & general works
900 - History & geography
330 - Economics
66
333 - Economics of land & energy
54
600 - Technology
52
700 - The arts; fine & decorative arts
52
620 - Engineering & allied operations
44
363 - Other social problems & services
43
380 - Commerce, communications & transportation
30
320 - Political science
21
300 - Social sciences
17
720 - Architecture
14
551 - Geology, hydrology & meteorology
13
140 - Specific philosophical schools
11
370 - Education
11
576 - Genetics & evolution
11
610 - Medicine & health
11
580 - Plants (Botany)
9
658 - General management
9
581 - Specific topics in natural history
8
301 - Sociology & anthropology
7
410 - Linguistics
7
630 - Agriculture & related technologies
7
800 - Literature & rhetoric
6
100 - Philosophy & psychology
5
200 - Religion
5
400 - Language
5
304 - Factors affecting social behavior
4
414 - Phonology & phonetics
4
500 - Natural sciences & mathematics
4
170 - Ethics
3
340 - Law
3
530 - Physics
3
540 - Chemistry & allied sciences
3
780 - Music
3
297 - Islam, Babism & Bahai Faith
2
770 - Photography, photographs & computer art
2
120 - Epistemology, causation & humankind
1
361 - Social problems & social welfare in general
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
590 - Animals (Zoology)
1
650 - Management & auxiliary services
1
657 - Accounting
1