Classification
330 - Economics
580 - Plants (Botany)
620 - Engineering & allied operations
600 - Technology
59
900 - History & geography
39
333 - Economics of land & energy
38
700 - The arts; fine & decorative arts
32
363 - Other social problems & services
23
000 - Computer science, information & general works
20
630 - Agriculture & related technologies
19
551 - Geology, hydrology & meteorology
12
610 - Medicine & health
11
658 - General management
11
380 - Commerce, communications & transportation
10
320 - Political science
8
576 - Genetics & evolution
5
720 - Architecture
5
140 - Specific philosophical schools
4
370 - Education
4
540 - Chemistry & allied sciences
4
340 - Law
3
800 - Literature & rhetoric
3
500 - Natural sciences & mathematics
2
581 - Specific topics in natural history
2
100 - Philosophy & psychology
1
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
400 - Language
1
770 - Photography, photographs & computer art
1