Classification
576 - Genetics & evolution
620 - Engineering & allied operations
600 - Technology
155
900 - History & geography
124
700 - The arts; fine & decorative arts
116
333 - Economics of land & energy
85
000 - Computer science, information & general works
63
363 - Other social problems & services
50
380 - Commerce, communications & transportation
47
330 - Economics
34
610 - Medicine & health
32
580 - Plants (Botany)
30
500 - Natural sciences & mathematics
27
140 - Specific philosophical schools
21
720 - Architecture
21
414 - Phonology & phonetics
19
340 - Law
17
540 - Chemistry & allied sciences
16
630 - Agriculture & related technologies
16
800 - Literature & rhetoric
14
658 - General management
12
551 - Geology, hydrology & meteorology
11
304 - Factors affecting social behavior
10
320 - Political science
10
300 - Social sciences
9
370 - Education
8
400 - Language
8
530 - Physics
7
581 - Specific topics in natural history
6
100 - Philosophy & psychology
5
612 - Human physiology
4
170 - Ethics
3
301 - Sociology & anthropology
3
770 - Photography, photographs & computer art
3
410 - Linguistics
2
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
361 - Social problems & social welfare in general
1
550 - Earth sciences
1
650 - Management & auxiliary services
1
657 - Accounting
1
780 - Music
1