Classification
600 - Technology
2,695
620 - Engineering & allied operations
169
658 - General management
62
000 - Computer science, information & general works
37
331 - Labor economics
34
005 - Computer programming, programs & data
28
384 - Communications; telecommunication
20
330 - Economics
18
500 - Natural sciences & mathematics
18
745 - Decorative arts
16
374 - Adult education
15
333 - Economics of land & energy
11
004 - Data processing & computer science
10
621 - Applied physics
9
629 - Other branches of engineering
9
900 - History & geography
9
700 - The arts; fine & decorative arts
8
300 - Social sciences
5
720 - Architecture
5
153 - Mental processes & intelligence
4
338 - Production
4
510 - Mathematics
4
140 - Specific philosophical schools
3
370 - Education
3
580 - Plants (Botany)
3
001 - Knowledge
2
003 - Systems
2
320 - Political science
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
400 - Language
2
519 - Probabilities & applied mathematics
2
576 - Genetics & evolution
2
610 - Medicine & health
2
670 - Manufacturing
2
006 - Special computer methods
1
100 - Philosophy & psychology
1
170 - Ethics
1
302 - Social interaction
1
307 - Communities
1
340 - Law
1
381 - Commerce
1
530 - Physics
1
623 - Military & nautical engineering
1
624 - Civil engineering
1
657 - Accounting
1
660 - Chemical engineering
1
662 - Explosives, fuels & related products
1
800 - Literature & rhetoric
1