Classification
627 - Hydraulic engineering
51
621 - Applied physics
23
620 - Engineering & allied operations
18
006 - Special computer methods
11
624 - Civil engineering
9
551 - Geology, hydrology & meteorology
8
003 - Systems
5
333 - Economics of land & energy
5
600 - Technology
3
330 - Economics
2
628 - Sanitary & municipal engineering
2
629 - Other branches of engineering
2
690 - Buildings
2
700 - The arts; fine & decorative arts
2
745 - Decorative arts
2
900 - History & geography
2
000 - Computer science, information & general works
1
005 - Computer programming, programs & data
1
100 - Philosophy & psychology
1
340 - Law
1
344 - Labor, social, education & cultural law
1
363 - Other social problems & services
1
550 - Earth sciences
1
580 - Plants (Botany)
1
610 - Medicine & health
1
623 - Military & nautical engineering
1
658 - General management
1
670 - Manufacturing
1
691 - Building materials
1
910 - Geography & travel
1