Classification
800 - Literature & rhetoric
330 - Economics
47
000 - Computer science, information & general works
31
600 - Technology
28
700 - The arts; fine & decorative arts
28
900 - History & geography
19
333 - Economics of land & energy
16
363 - Other social problems & services
15
320 - Political science
14
380 - Commerce, communications & transportation
14
338 - Production
11
610 - Medicine & health
11
620 - Engineering & allied operations
11
576 - Genetics & evolution
10
140 - Specific philosophical schools
9
658 - General management
9
580 - Plants (Botany)
8
300 - Social sciences
6
381 - Commerce
5
581 - Specific topics in natural history
5
650 - Management & auxiliary services
5
720 - Architecture
5
158 - Applied psychology
4
370 - Education
4
410 - Linguistics
4
500 - Natural sciences & mathematics
4
540 - Chemistry & allied sciences
4
551 - Geology, hydrology & meteorology
4
100 - Philosophy & psychology
3
400 - Language
3
791 - Public performances
3
170 - Ethics
2
302 - Social interaction
2
530 - Physics
2
630 - Agriculture & related technologies
2
670 - Manufacturing
2
001 - Knowledge
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
332 - Financial economics
1
340 - Law
1
510 - Mathematics
1
590 - Animals (Zoology)
1
615 - Pharmacology & therapeutics
1
621 - Applied physics
1
629 - Other branches of engineering
1
657 - Accounting
1
780 - Music
1