Classification
520 - Astronomy & allied sciences
62
330 - Economics
15
500 - Natural sciences & mathematics
14
523 - Specific celestial bodies & phenomena
13
658 - General management
11
530 - Physics
9
005 - Computer programming, programs & data
7
616 - Diseases
7
300 - Social sciences
6
338 - Production
6
610 - Medicine & health
5
820 - English & Old English literatures
5
302 - Social interaction
4
006 - Special computer methods
3
158 - Applied psychology
3
541 - Physical chemistry
3
650 - Management & auxiliary services
3
700 - The arts; fine & decorative arts
3
001 - Knowledge
2
120 - Epistemology, causation & humankind
2
240 - Christian moral & devotional theology
2
332 - Financial economics
2
380 - Commerce, communications & transportation
2
384 - Communications; telecommunication
2
571 - Physiology & related subjects
2
618 - Gynecology, obstetrics, pediatrics & geriatrics
2
670 - Manufacturing
2
780 - Music
2
800 - Literature & rhetoric
2
000 - Computer science, information & general works
1
040 - [Unassigned]
1
100 - Philosophy & psychology
1
150 - Psychology
1
153 - Mental processes & intelligence
1
170 - Ethics
1
200 - Religion
1
280 - Christian denominations & sects
1
301 - Sociology & anthropology
1
303 - Social processes
1
305 - Social groups
1
320 - Political science
1
331 - Labor economics
1
333 - Economics of land & energy
1
340 - Law
1
519 - Probabilities & applied mathematics
1
522 - Techniques, equipment & materials
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
570 - Life sciences; biology
1
580 - Plants (Botany)
1
more ...