Classification
005 - Computer programming, programs & data
5,932
004 - Data processing & computer science
3,021
006 - Special computer methods
2,675
000 - Computer science, information & general works
785
658 - General management
773
331 - Labor economics
570
500 - Natural sciences & mathematics
529
621 - Applied physics
460
620 - Engineering & allied operations
448
745 - Decorative arts
366
025 - Library operations
289
003 - Systems
240
330 - Economics
174
384 - Communications; telecommunication
136
381 - Commerce
132
371 - Schools & their activities; special education
124
650 - Management & auxiliary services
121
518 - Numerical analysis
114
303 - Social processes
112
302 - Social interaction
82
610 - Medicine & health
79
670 - Manufacturing
77
600 - Technology
63
374 - Adult education
57
338 - Production
54
794 - Indoor games of skill
47
629 - Other branches of engineering
45
300 - Social sciences
37
570 - Life sciences; biology
30
910 - Geography & travel
30
332 - Financial economics
26
519 - Probabilities & applied mathematics
26
001 - Knowledge
15
020 - Library & information sciences
14
510 - Mathematics
12
153 - Mental processes & intelligence
10
340 - Law
9
380 - Commerce, communications & transportation
9
304 - Factors affecting social behavior
7
370 - Education
7
515 - Analysis
7
502 - Miscellany
6
530 - Physics
6
808 - Rhetoric & collections of literature
6
011 - Bibliographies
5
320 - Political science
5
333 - Economics of land & energy
5
550 - Earth sciences
5
657 - Accounting
5
323 - Civil & political rights
4
more ...