Classification
500 - Natural sciences & mathematics
005 - Computer programming, programs & data
2,589
658 - General management
2,543
620 - Engineering & allied operations
2,316
330 - Economics
1,939
300 - Social sciences
1,558
302 - Social interaction
1,555
331 - Labor economics
1,431
670 - Manufacturing
1,408
004 - Data processing & computer science
1,122
384 - Communications; telecommunication
985
006 - Special computer methods
774
000 - Computer science, information & general works
671
745 - Decorative arts
509
338 - Production
460
381 - Commerce
313
510 - Mathematics
234
153 - Mental processes & intelligence
187
374 - Adult education
165
519 - Probabilities & applied mathematics
162
650 - Management & auxiliary services
152
158 - Applied psychology
148
621 - Applied physics
148
303 - Social processes
119
363 - Other social problems & services
115
332 - Financial economics
108
364 - Criminology
99
001 - Knowledge
97
380 - Commerce, communications & transportation
83
025 - Library operations
81
629 - Other branches of engineering
48
794 - Indoor games of skill
40
368 - Insurance
39
770 - Photography, photographs & computer art
36
600 - Technology
35
660 - Chemical engineering
35
530 - Physics
34
003 - Systems
31
155 - Differential & developmental psychology
25
352 - General considerations of public administration
25
659 - Advertising & public relations
25
910 - Geography & travel
25
808 - Rhetoric & collections of literature
23
362 - Social welfare problems & services
22
306 - Culture & institutions
21
610 - Medicine & health
20
150 - Psychology
19
570 - Life sciences; biology
19
572 - Biochemistry
19
612 - Human physiology
19
more ...