Classification
620 - Engineering & allied operations
658 - General management
330 - Economics
9
000 - Computer science, information & general works
6
500 - Natural sciences & mathematics
6
600 - Technology
6
900 - History & geography
6
140 - Specific philosophical schools
4
700 - The arts; fine & decorative arts
4
363 - Other social problems & services
3
384 - Communications; telecommunication
3
005 - Computer programming, programs & data
2
331 - Labor economics
2
362 - Social welfare problems & services
2
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
610 - Medicine & health
2
001 - Knowledge
1
300 - Social sciences
1
302 - Social interaction
1
320 - Political science
1
333 - Economics of land & energy
1
338 - Production
1
343 - Military, tax, trade & industrial law
1
370 - Education
1
381 - Commerce
1
387 - Water, air & space transportation
1
400 - Language
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
624 - Civil engineering
1
629 - Other branches of engineering
1
720 - Architecture
1
745 - Decorative arts
1
770 - Photography, photographs & computer art
1
780 - Music
1