Classification
001 - Knowledge
1
100 - Philosophy & psychology
5
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
3
158 - Applied psychology
6
170 - Ethics
174 - Occupational ethics
7
200 - Religion
3
300 - Social sciences
10
302 - Social interaction
7
303 - Social processes
1
304 - Factors affecting social behavior
1
320 - Political science
10
330 - Economics
35
331 - Labor economics
9
333 - Economics of land & energy
1
338 - Production
5
340 - Law
3
355 - Military science
1
361 - Social problems & social welfare in general
2
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
381 - Commerce
2
384 - Communications; telecommunication
2
400 - Language
2
500 - Natural sciences & mathematics
3
580 - Plants (Botany)
1
610 - Medicine & health
6
620 - Engineering & allied operations
1
650 - Management & auxiliary services
4
658 - General management
22
659 - Advertising & public relations
3
670 - Manufacturing
4
700 - The arts; fine & decorative arts
1
780 - Music
1
900 - History & geography
5