Classification
600 - Technology
620 - Engineering & allied operations
203
700 - The arts; fine & decorative arts
199
900 - History & geography
170
333 - Economics of land & energy
126
000 - Computer science, information & general works
60
610 - Medicine & health
46
380 - Commerce, communications & transportation
39
580 - Plants (Botany)
34
363 - Other social problems & services
33
140 - Specific philosophical schools
31
330 - Economics
31
540 - Chemistry & allied sciences
24
576 - Genetics & evolution
21
500 - Natural sciences & mathematics
17
530 - Physics
17
340 - Law
14
414 - Phonology & phonetics
12
720 - Architecture
12
800 - Literature & rhetoric
7
370 - Education
6
612 - Human physiology
5
304 - Factors affecting social behavior
4
630 - Agriculture & related technologies
4
551 - Geology, hydrology & meteorology
3
320 - Political science
2
400 - Language
2
658 - General management
2
160 - Logic
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
520 - Astronomy & allied sciences
1
581 - Specific topics in natural history
1
621 - Applied physics
1
650 - Management & auxiliary services
1
780 - Music
1