Classification
745 - Decorative arts
620 - Engineering & allied operations
684
500 - Natural sciences & mathematics
243
005 - Computer programming, programs & data
159
621 - Applied physics
155
384 - Communications; telecommunication
120
331 - Labor economics
114
658 - General management
98
006 - Special computer methods
91
000 - Computer science, information & general works
47
629 - Other branches of engineering
41
004 - Data processing & computer science
32
381 - Commerce
32
302 - Social interaction
31
330 - Economics
27
686 - Printing & related activities
21
790 - Recreational & performing arts
19
510 - Mathematics
13
740 - Drawing & decorative arts
12
338 - Production
11
670 - Manufacturing
11
770 - Photography, photographs & computer art
11
600 - Technology
10
025 - Library operations
9
681 - Precision instruments & other devices
9
794 - Indoor games of skill
9
374 - Adult education
8
624 - Civil engineering
8
741 - Drawing & drawings
8
001 - Knowledge
7
604 - Special topics
7
003 - Systems
6
153 - Mental processes & intelligence
5
300 - Social sciences
5
688 - Other final products & packaging
5
781 - General principles & musical forms
5
303 - Social processes
3
333 - Economics of land & energy
3
628 - Sanitary & municipal engineering
3
659 - Advertising & public relations
3
720 - Architecture
3
380 - Commerce, communications & transportation
2
677 - Textiles
2
687 - Clothing & accessories
2
808 - Rhetoric & collections of literature
2
011 - Bibliographies
1
158 - Applied psychology
1
363 - Other social problems & services
1
368 - Insurance
1
371 - Schools & their activities; special education
1
more ...