Classification
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
600 - Technology
45
900 - History & geography
42
333 - Economics of land & energy
27
000 - Computer science, information & general works
16
610 - Medicine & health
15
576 - Genetics & evolution
14
363 - Other social problems & services
12
580 - Plants (Botany)
11
380 - Commerce, communications & transportation
10
140 - Specific philosophical schools
9
330 - Economics
9
414 - Phonology & phonetics
7
500 - Natural sciences & mathematics
7
540 - Chemistry & allied sciences
6
100 - Philosophy & psychology
5
370 - Education
5
551 - Geology, hydrology & meteorology
5
300 - Social sciences
4
581 - Specific topics in natural history
4
720 - Architecture
4
612 - Human physiology
3
630 - Agriculture & related technologies
3
297 - Islam, Babism & Bahai Faith
1
320 - Political science
1
530 - Physics
1
657 - Accounting
1
658 - General management
1
770 - Photography, photographs & computer art
1