Classification
658 - General management
15
006 - Special computer methods
11
620 - Engineering & allied operations
7
624 - Civil engineering
7
641 - Food & drink
7
664 - Food technology
7
333 - Economics of land & energy
6
621 - Applied physics
6
670 - Manufacturing
6
628 - Sanitary & municipal engineering
5
629 - Other branches of engineering
5
519 - Probabilities & applied mathematics
4
690 - Buildings
4
005 - Computer programming, programs & data
3
338 - Production
3
551 - Geology, hydrology & meteorology
3
660 - Chemical engineering
3
530 - Physics
2
534 - Sound & related vibrations
2
553 - Economic geology
2
627 - Hydraulic engineering
2
000 - Computer science, information & general works
1
003 - Systems
1
004 - Data processing & computer science
1
158 - Applied psychology
1
170 - Ethics
1
330 - Economics
1
363 - Other social problems & services
1
370 - Education
1
539 - Modern physics
1
600 - Technology
1
610 - Medicine & health
1
613 - Personal health & safety
1
616 - Diseases
1