Classification
000 - Computer science, information & general works
61
580 - Plants (Botany)
55
600 - Technology
49
700 - The arts; fine & decorative arts
44
610 - Medicine & health
42
630 - Agriculture & related technologies
40
333 - Economics of land & energy
38
620 - Engineering & allied operations
34
330 - Economics
31
363 - Other social problems & services
31
551 - Geology, hydrology & meteorology
19
380 - Commerce, communications & transportation
17
900 - History & geography
16
576 - Genetics & evolution
12
581 - Specific topics in natural history
8
658 - General management
8
140 - Specific philosophical schools
7
320 - Political science
6
340 - Law
5
540 - Chemistry & allied sciences
5
100 - Philosophy & psychology
3
370 - Education
3
414 - Phonology & phonetics
3
530 - Physics
3
612 - Human physiology
3
650 - Management & auxiliary services
3
720 - Architecture
3
361 - Social problems & social welfare in general
2
304 - Factors affecting social behavior
1
336 - Public finance
1
400 - Language
1
410 - Linguistics
1
550 - Earth sciences
1
657 - Accounting
1
770 - Photography, photographs & computer art
1