Classification
300 - Social sciences
658 - General management
38
338 - Production
29
330 - Economics
24
302 - Social interaction
15
362 - Social welfare problems & services
9
500 - Natural sciences & mathematics
9
620 - Engineering & allied operations
9
670 - Manufacturing
9
331 - Labor economics
6
333 - Economics of land & energy
3
363 - Other social problems & services
3
381 - Commerce
3
580 - Plants (Botany)
3
600 - Technology
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
001 - Knowledge
2
140 - Specific philosophical schools
2
158 - Applied psychology
2
170 - Ethics
2
340 - Law
2
380 - Commerce, communications & transportation
2
384 - Communications; telecommunication
2
576 - Genetics & evolution
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
720 - Architecture
2
800 - Literature & rhetoric
2
900 - History & geography
2
005 - Computer programming, programs & data
1
120 - Epistemology, causation & humankind
1
150 - Psychology
1
153 - Mental processes & intelligence
1
370 - Education
1
519 - Probabilities & applied mathematics
1
581 - Specific topics in natural history
1
650 - Management & auxiliary services
1