Classification
330 - Economics
363 - Other social problems & services
600 - Technology
900 - History & geography
620 - Engineering & allied operations
85
333 - Economics of land & energy
58
700 - The arts; fine & decorative arts
47
380 - Commerce, communications & transportation
30
000 - Computer science, information & general works
24
610 - Medicine & health
19
370 - Education
16
320 - Political science
15
580 - Plants (Botany)
15
551 - Geology, hydrology & meteorology
14
140 - Specific philosophical schools
12
720 - Architecture
11
658 - General management
9
800 - Literature & rhetoric
6
300 - Social sciences
5
576 - Genetics & evolution
5
581 - Specific topics in natural history
5
400 - Language
4
630 - Agriculture & related technologies
4
304 - Factors affecting social behavior
3
340 - Law
3
200 - Religion
2
414 - Phonology & phonetics
2
500 - Natural sciences & mathematics
2
540 - Chemistry & allied sciences
2
657 - Accounting
2
100 - Philosophy & psychology
1
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
410 - Linguistics
1
530 - Physics
1
615 - Pharmacology & therapeutics
1