Classification
330 - Economics
380 - Commerce, communications & transportation
610 - Medicine & health
900 - History & geography
700 - The arts; fine & decorative arts
12
333 - Economics of land & energy
9
600 - Technology
9
000 - Computer science, information & general works
7
363 - Other social problems & services
7
620 - Engineering & allied operations
7
140 - Specific philosophical schools
6
720 - Architecture
6
320 - Political science
4
370 - Education
4
551 - Geology, hydrology & meteorology
3
576 - Genetics & evolution
3
800 - Literature & rhetoric
3
340 - Law
2
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
301 - Sociology & anthropology
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
580 - Plants (Botany)
1
658 - General management
1