Classification
363 - Other social problems & services
576 - Genetics & evolution
900 - History & geography
600 - Technology
30
620 - Engineering & allied operations
29
700 - The arts; fine & decorative arts
27
333 - Economics of land & energy
18
380 - Commerce, communications & transportation
16
000 - Computer science, information & general works
13
140 - Specific philosophical schools
10
610 - Medicine & health
9
330 - Economics
8
580 - Plants (Botany)
8
720 - Architecture
8
320 - Political science
7
340 - Law
6
300 - Social sciences
5
500 - Natural sciences & mathematics
5
581 - Specific topics in natural history
5
800 - Literature & rhetoric
5
370 - Education
4
414 - Phonology & phonetics
4
551 - Geology, hydrology & meteorology
4
304 - Factors affecting social behavior
3
630 - Agriculture & related technologies
3
100 - Philosophy & psychology
2
170 - Ethics
2
400 - Language
2
530 - Physics
2
658 - General management
2
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
350 - Public administration & military science
1
364 - Criminology
1
410 - Linguistics
1
650 - Management & auxiliary services
1