Classification
380 - Commerce, communications & transportation
600 - Technology
4
000 - Computer science, information & general works
3
700 - The arts; fine & decorative arts
3
140 - Specific philosophical schools
2
658 - General management
2
100 - Philosophy & psychology
1
300 - Social sciences
1
301 - Sociology & anthropology
1
302 - Social interaction
1
320 - Political science
1
330 - Economics
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
370 - Education
1
384 - Communications; telecommunication
1
400 - Language
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
610 - Medicine & health
1
670 - Manufacturing
1
800 - Literature & rhetoric
1