Classification
320 - Political science
330 - Economics
600 - Technology
333 - Economics of land & energy
134
700 - The arts; fine & decorative arts
107
363 - Other social problems & services
82
370 - Education
61
620 - Engineering & allied operations
59
000 - Computer science, information & general works
50
610 - Medicine & health
50
900 - History & geography
50
380 - Commerce, communications & transportation
43
630 - Agriculture & related technologies
39
300 - Social sciences
35
304 - Factors affecting social behavior
35
551 - Geology, hydrology & meteorology
32
140 - Specific philosophical schools
22
100 - Philosophy & psychology
16
581 - Specific topics in natural history
15
658 - General management
14
340 - Law
12
576 - Genetics & evolution
10
580 - Plants (Botany)
10
657 - Accounting
8
720 - Architecture
8
170 - Ethics
7
200 - Religion
7
800 - Literature & rhetoric
7
400 - Language
6
780 - Music
6
301 - Sociology & anthropology
5
350 - Public administration & military science
5
361 - Social problems & social welfare in general
5
410 - Linguistics
5
530 - Physics
4
500 - Natural sciences & mathematics
3
540 - Chemistry & allied sciences
3
160 - Logic
2
297 - Islam, Babism & Bahai Faith
2
336 - Public finance
2
360 - Social problems & services; associations
2
414 - Phonology & phonetics
2
770 - Photography, photographs & computer art
2
520 - Astronomy & allied sciences
1
603 - Dictionaries & encyclopedias
1
650 - Management & auxiliary services
1