Classification
658 - General management
900 - History & geography
54
600 - Technology
42
620 - Engineering & allied operations
41
330 - Economics
26
700 - The arts; fine & decorative arts
26
380 - Commerce, communications & transportation
20
000 - Computer science, information & general works
17
333 - Economics of land & energy
16
363 - Other social problems & services
14
140 - Specific philosophical schools
8
370 - Education
8
580 - Plants (Botany)
8
320 - Political science
7
576 - Genetics & evolution
7
610 - Medicine & health
7
720 - Architecture
6
410 - Linguistics
5
100 - Philosophy & psychology
4
300 - Social sciences
4
340 - Law
4
400 - Language
4
500 - Natural sciences & mathematics
4
800 - Literature & rhetoric
4
630 - Agriculture & related technologies
3
540 - Chemistry & allied sciences
2
780 - Music
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
530 - Physics
1
550 - Earth sciences
1
581 - Specific topics in natural history
1
770 - Photography, photographs & computer art
1