Classification
600 - Technology
620 - Engineering & allied operations
900 - History & geography
57
363 - Other social problems & services
56
330 - Economics
55
333 - Economics of land & energy
55
700 - The arts; fine & decorative arts
49
000 - Computer science, information & general works
32
540 - Chemistry & allied sciences
22
658 - General management
21
380 - Commerce, communications & transportation
18
610 - Medicine & health
16
630 - Agriculture & related technologies
16
320 - Political science
15
370 - Education
14
500 - Natural sciences & mathematics
12
580 - Plants (Botany)
11
140 - Specific philosophical schools
10
576 - Genetics & evolution
10
720 - Architecture
10
300 - Social sciences
7
338 - Production
7
340 - Law
7
551 - Geology, hydrology & meteorology
7
800 - Literature & rhetoric
5
581 - Specific topics in natural history
4
304 - Factors affecting social behavior
3
400 - Language
3
414 - Phonology & phonetics
3
100 - Philosophy & psychology
2
200 - Religion
2
410 - Linguistics
2
530 - Physics
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
629 - Other branches of engineering
1
657 - Accounting
1
664 - Food technology
1
780 - Music
1