Classification
300 - Social sciences
380 - Commerce, communications & transportation
330 - Economics
7
333 - Economics of land & energy
4
340 - Law
4
370 - Education
4
658 - General management
4
700 - The arts; fine & decorative arts
4
363 - Other social problems & services
3
384 - Communications; telecommunication
3
400 - Language
3
600 - Technology
3
630 - Agriculture & related technologies
3
900 - History & geography
3
140 - Specific philosophical schools
2
170 - Ethics
2
302 - Social interaction
2
320 - Political science
2
500 - Natural sciences & mathematics
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
610 - Medicine & health
2
620 - Engineering & allied operations
2
670 - Manufacturing
2
720 - Architecture
2
800 - Literature & rhetoric
2
000 - Computer science, information & general works
1
153 - Mental processes & intelligence
1
200 - Religion
1
301 - Sociology & anthropology
1
361 - Social problems & social welfare in general
1
381 - Commerce
1
410 - Linguistics
1
414 - Phonology & phonetics
1
650 - Management & auxiliary services
1
657 - Accounting
1
791 - Public performances
1