Classification
600 - Technology
700 - The arts; fine & decorative arts
119
620 - Engineering & allied operations
101
900 - History & geography
72
333 - Economics of land & energy
59
000 - Computer science, information & general works
37
540 - Chemistry & allied sciences
33
610 - Medicine & health
32
580 - Plants (Botany)
28
363 - Other social problems & services
24
576 - Genetics & evolution
19
330 - Economics
17
380 - Commerce, communications & transportation
17
140 - Specific philosophical schools
15
500 - Natural sciences & mathematics
13
414 - Phonology & phonetics
10
340 - Law
6
630 - Agriculture & related technologies
6
800 - Literature & rhetoric
4
720 - Architecture
3
400 - Language
2
551 - Geology, hydrology & meteorology
2
658 - General management
2
170 - Ethics
1
304 - Factors affecting social behavior
1
370 - Education
1
530 - Physics
1
581 - Specific topics in natural history
1