Classification
629 - Other branches of engineering
325
621 - Applied physics
125
620 - Engineering & allied operations
28
600 - Technology
4
502 - Miscellany
3
667 - Cleaning, color & coating technologies
3
670 - Manufacturing
3
333 - Economics of land & energy
2
338 - Production
2
374 - Adult education
2
607 - Education, research & related topics
2
624 - Civil engineering
2
003 - Systems
1
005 - Computer programming, programs & data
1
153 - Mental processes & intelligence
1
301 - Sociology & anthropology
1
370 - Education
1
388 - Transportation; ground transportation
1
623 - Military & nautical engineering
1
660 - Chemical engineering
1
690 - Buildings
1