Classification
600 - Technology
620 - Engineering & allied operations
183
700 - The arts; fine & decorative arts
180
333 - Economics of land & energy
170
900 - History & geography
155
363 - Other social problems & services
113
330 - Economics
106
000 - Computer science, information & general works
98
380 - Commerce, communications & transportation
92
140 - Specific philosophical schools
68
320 - Political science
56
610 - Medicine & health
55
370 - Education
40
551 - Geology, hydrology & meteorology
36
580 - Plants (Botany)
34
720 - Architecture
34
576 - Genetics & evolution
32
658 - General management
28
500 - Natural sciences & mathematics
26
340 - Law
25
630 - Agriculture & related technologies
22
300 - Social sciences
11
581 - Specific topics in natural history
11
400 - Language
10
530 - Physics
10
800 - Literature & rhetoric
10
100 - Philosophy & psychology
8
540 - Chemistry & allied sciences
7
657 - Accounting
7
170 - Ethics
6
410 - Linguistics
5
770 - Photography, photographs & computer art
5
304 - Factors affecting social behavior
4
780 - Music
4
414 - Phonology & phonetics
3
200 - Religion
2
350 - Public administration & military science
2
360 - Social problems & services; associations
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
650 - Management & auxiliary services
1