Classification
363 - Other social problems & services
600 - Technology
610 - Medicine & health
900 - History & geography
620 - Engineering & allied operations
54
333 - Economics of land & energy
38
700 - The arts; fine & decorative arts
33
330 - Economics
19
580 - Plants (Botany)
13
140 - Specific philosophical schools
12
720 - Architecture
12
380 - Commerce, communications & transportation
11
000 - Computer science, information & general works
9
370 - Education
9
320 - Political science
7
551 - Geology, hydrology & meteorology
7
576 - Genetics & evolution
7
630 - Agriculture & related technologies
7
300 - Social sciences
6
540 - Chemistry & allied sciences
6
800 - Literature & rhetoric
5
100 - Philosophy & psychology
4
304 - Factors affecting social behavior
4
170 - Ethics
3
340 - Law
3
658 - General management
3
400 - Language
2
410 - Linguistics
2
500 - Natural sciences & mathematics
2
581 - Specific topics in natural history
2
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
414 - Phonology & phonetics
1
530 - Physics
1