Classification
330 - Economics
581 - Specific topics in natural history
363 - Other social problems & services
82
333 - Economics of land & energy
70
320 - Political science
40
600 - Technology
40
551 - Geology, hydrology & meteorology
37
000 - Computer science, information & general works
33
700 - The arts; fine & decorative arts
29
630 - Agriculture & related technologies
25
140 - Specific philosophical schools
23
900 - History & geography
21
620 - Engineering & allied operations
20
610 - Medicine & health
19
580 - Plants (Botany)
16
380 - Commerce, communications & transportation
14
100 - Philosophy & psychology
9
300 - Social sciences
8
304 - Factors affecting social behavior
8
370 - Education
8
170 - Ethics
7
200 - Religion
7
340 - Law
7
576 - Genetics & evolution
7
414 - Phonology & phonetics
4
540 - Chemistry & allied sciences
4
658 - General management
4
301 - Sociology & anthropology
3
500 - Natural sciences & mathematics
3
800 - Literature & rhetoric
3
297 - Islam, Babism & Bahai Faith
2
350 - Public administration & military science
2
410 - Linguistics
2
520 - Astronomy & allied sciences
2
720 - Architecture
2
530 - Physics
1
590 - Animals (Zoology)
1
612 - Human physiology
1
657 - Accounting
1
791 - Public performances
1