Classification
333 - Economics of land & energy
600 - Technology
330 - Economics
102
363 - Other social problems & services
93
620 - Engineering & allied operations
89
700 - The arts; fine & decorative arts
82
320 - Political science
57
900 - History & geography
57
000 - Computer science, information & general works
51
551 - Geology, hydrology & meteorology
45
380 - Commerce, communications & transportation
39
610 - Medicine & health
35
370 - Education
25
581 - Specific topics in natural history
24
140 - Specific philosophical schools
22
630 - Agriculture & related technologies
22
580 - Plants (Botany)
19
576 - Genetics & evolution
16
658 - General management
13
500 - Natural sciences & mathematics
11
300 - Social sciences
10
720 - Architecture
9
800 - Literature & rhetoric
8
100 - Philosophy & psychology
7
340 - Law
7
304 - Factors affecting social behavior
6
530 - Physics
6
540 - Chemistry & allied sciences
6
657 - Accounting
5
170 - Ethics
4
200 - Religion
4
350 - Public administration & military science
4
297 - Islam, Babism & Bahai Faith
3
301 - Sociology & anthropology
2
400 - Language
2
410 - Linguistics
2
520 - Astronomy & allied sciences
2
160 - Logic
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
414 - Phonology & phonetics
1
550 - Earth sciences
1
650 - Management & auxiliary services
1