Classification
003 - Systems
103
153 - Mental processes & intelligence
1
300 - Social sciences
2
302 - Social interaction
1
330 - Economics
3
331 - Labor economics
1
338 - Production
8
372 - Elementary education
1
381 - Commerce
4
384 - Communications; telecommunication
2
500 - Natural sciences & mathematics
6
600 - Technology
6
620 - Engineering & allied operations
12
621 - Applied physics
1
629 - Other branches of engineering
650 - Management & auxiliary services
1
658 - General management
11
664 - Food technology
1
670 - Manufacturing
2
745 - Decorative arts
5
800 - Literature & rhetoric
1