Classification
331 - Labor economics
658 - General management
254
330 - Economics
212
005 - Computer programming, programs & data
103
300 - Social sciences
93
302 - Social interaction
92
500 - Natural sciences & mathematics
81
338 - Production
73
384 - Communications; telecommunication
73
004 - Data processing & computer science
68
006 - Special computer methods
46
620 - Engineering & allied operations
39
670 - Manufacturing
31
381 - Commerce
29
374 - Adult education
28
650 - Management & auxiliary services
28
000 - Computer science, information & general works
27
745 - Decorative arts
22
158 - Applied psychology
18
303 - Social processes
16
304 - Factors affecting social behavior
13
001 - Knowledge
12
170 - Ethics
9
621 - Applied physics
9
332 - Financial economics
8
364 - Criminology
8
153 - Mental processes & intelligence
7
380 - Commerce, communications & transportation
7
363 - Other social problems & services
5
659 - Advertising & public relations
4
011 - Bibliographies
3
174 - Occupational ethics
3
368 - Insurance
3
510 - Mathematics
3
025 - Library operations
2
150 - Psychology
2
305 - Social groups
2
306 - Culture & institutions
2
600 - Technology
2
071 - Newspapers in North America
1
201 - Religious mythology & social theology
1
336 - Public finance
1
339 - Macroeconomics & related topics
1
342 - Constitutional & administrative law
1
352 - General considerations of public administration
1
361 - Social problems & social welfare in general
1
362 - Social welfare problems & services
1
387 - Water, air & space transportation
1
507 - Education, research & related topics
1
519 - Probabilities & applied mathematics
1
more ...