Classification
620 - Engineering & allied operations
143
621 - Applied physics
54
534 - Sound & related vibrations
50
629 - Other branches of engineering
13
530 - Physics
7
781 - General principles & musical forms
7
660 - Chemical engineering
4
531 - Classical mechanics; solid mechanics
3
681 - Precision instruments & other devices
3
691 - Building materials
3
697 - Heating, ventilating & air-conditioning
2
780 - Music
2
003 - Systems
1
006 - Special computer methods
1
331 - Labor economics
1
362 - Social welfare problems & services
1
363 - Other social problems & services
1
374 - Adult education
1
384 - Communications; telecommunication
1
511 - General principles of mathematics
1
515 - Analysis
1
551 - Geology, hydrology & meteorology
1
658 - General management
1
662 - Explosives, fuels & related products
1
690 - Buildings
1
745 - Decorative arts
1
786 - Keyboard & other instruments
1