Classification
658 - General management
129
330 - Economics
97
331 - Labor economics
73
300 - Social sciences
43
005 - Computer programming, programs & data
33
302 - Social interaction
32
000 - Computer science, information & general works
20
620 - Engineering & allied operations
19
650 - Management & auxiliary services
18
500 - Natural sciences & mathematics
16
338 - Production
14
384 - Communications; telecommunication
12
158 - Applied psychology
11
004 - Data processing & computer science
10
153 - Mental processes & intelligence
10
380 - Commerce, communications & transportation
10
006 - Special computer methods
8
670 - Manufacturing
8
381 - Commerce
7
507 - Education, research & related topics
5
610 - Medicine & health
5
303 - Social processes
3
370 - Education
3
616 - Diseases
3
011 - Bibliographies
2
140 - Specific philosophical schools
2
333 - Economics of land & energy
2
352 - General considerations of public administration
2
362 - Social welfare problems & services
2
374 - Adult education
2
613 - Personal health & safety
2
614 - Incidence & prevention of disease
2
700 - The arts; fine & decorative arts
2
001 - Knowledge
1
003 - Systems
1
100 - Philosophy & psychology
1
150 - Psychology
1
152 - Perception, movement, emotions & drives
1
155 - Differential & developmental psychology
1
160 - Logic
1
307 - Communities
1
321 - Systems of governments & states
1
332 - Financial economics
1
336 - Public finance
1
353 - Specific fields of public administration
1
363 - Other social problems & services
1
410 - Linguistics
1
414 - Phonology & phonetics
1
510 - Mathematics
1
534 - Sound & related vibrations
1
more ...