Classification
340 - Law
600 - Technology
620 - Engineering & allied operations
900 - History & geography
71
700 - The arts; fine & decorative arts
51
333 - Economics of land & energy
32
363 - Other social problems & services
23
380 - Commerce, communications & transportation
20
330 - Economics
18
500 - Natural sciences & mathematics
15
576 - Genetics & evolution
15
000 - Computer science, information & general works
13
580 - Plants (Botany)
13
140 - Specific philosophical schools
12
320 - Political science
11
610 - Medicine & health
8
630 - Agriculture & related technologies
8
720 - Architecture
8
370 - Education
7
414 - Phonology & phonetics
7
170 - Ethics
6
530 - Physics
6
551 - Geology, hydrology & meteorology
6
300 - Social sciences
5
400 - Language
5
658 - General management
5
100 - Philosophy & psychology
4
800 - Literature & rhetoric
4
410 - Linguistics
3
304 - Factors affecting social behavior
2
200 - Religion
1
301 - Sociology & anthropology
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
657 - Accounting
1
780 - Music
1