Classification
000 - Computer science, information & general works
333 - Economics of land & energy
363 - Other social problems & services
77
700 - The arts; fine & decorative arts
70
330 - Economics
57
551 - Geology, hydrology & meteorology
40
581 - Specific topics in natural history
37
600 - Technology
37
580 - Plants (Botany)
35
320 - Political science
32
610 - Medicine & health
32
380 - Commerce, communications & transportation
31
576 - Genetics & evolution
31
140 - Specific philosophical schools
27
900 - History & geography
27
620 - Engineering & allied operations
24
630 - Agriculture & related technologies
19
370 - Education
16
500 - Natural sciences & mathematics
12
304 - Factors affecting social behavior
11
340 - Law
11
414 - Phonology & phonetics
11
540 - Chemistry & allied sciences
10
658 - General management
10
720 - Architecture
8
530 - Physics
6
300 - Social sciences
5
612 - Human physiology
5
170 - Ethics
4
400 - Language
4
800 - Literature & rhetoric
3
100 - Philosophy & psychology
2
410 - Linguistics
2
550 - Earth sciences
2
657 - Accounting
2
160 - Logic
1
200 - Religion
1
301 - Sociology & anthropology
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
520 - Astronomy & allied sciences
1
650 - Management & auxiliary services
1