Classification
363 - Other social problems & services
370 - Education
600 - Technology
333 - Economics of land & energy
42
330 - Economics
39
700 - The arts; fine & decorative arts
34
620 - Engineering & allied operations
32
900 - History & geography
28
610 - Medicine & health
25
320 - Political science
24
380 - Commerce, communications & transportation
24
000 - Computer science, information & general works
23
140 - Specific philosophical schools
14
551 - Geology, hydrology & meteorology
13
304 - Factors affecting social behavior
9
400 - Language
9
720 - Architecture
9
630 - Agriculture & related technologies
8
300 - Social sciences
6
576 - Genetics & evolution
6
658 - General management
6
340 - Law
5
500 - Natural sciences & mathematics
5
581 - Specific topics in natural history
5
100 - Philosophy & psychology
4
800 - Literature & rhetoric
4
540 - Chemistry & allied sciences
3
580 - Plants (Botany)
3
200 - Religion
2
410 - Linguistics
2
530 - Physics
2
657 - Accounting
2
160 - Logic
1
360 - Social problems & services; associations
1
414 - Phonology & phonetics
1
770 - Photography, photographs & computer art
1