Classification
331 - Labor economics
005 - Computer programming, programs & data
542
658 - General management
508
330 - Economics
403
300 - Social sciences
256
500 - Natural sciences & mathematics
154
620 - Engineering & allied operations
144
650 - Management & auxiliary services
144
006 - Special computer methods
139
000 - Computer science, information & general works
125
745 - Decorative arts
122
302 - Social interaction
113
004 - Data processing & computer science
105
338 - Production
96
384 - Communications; telecommunication
89
158 - Applied psychology
68
304 - Factors affecting social behavior
45
381 - Commerce
37
153 - Mental processes & intelligence
27
670 - Manufacturing
22
380 - Commerce, communications & transportation
19
001 - Knowledge
14
374 - Adult education
13
170 - Ethics
10
368 - Insurance
8
011 - Bibliographies
6
155 - Differential & developmental psychology
4
332 - Financial economics
4
020 - Library & information sciences
3
150 - Psychology
3
510 - Mathematics
3
339 - Macroeconomics & related topics
2
600 - Technology
2
629 - Other branches of engineering
2
794 - Indoor games of skill
2
152 - Perception, movement, emotions & drives
1
303 - Social processes
1
306 - Culture & institutions
1
324 - The political process
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
364 - Criminology
1
371 - Schools & their activities; special education
1
410 - Linguistics
1
511 - General principles of mathematics
1
519 - Probabilities & applied mathematics
1
621 - Applied physics
1
639 - Hunting, fishing & conservation
1
641 - Food & drink
1
659 - Advertising & public relations
1
more ...