Classification
331 - Labor economics
600 - Technology
658 - General management
6
004 - Data processing & computer science
5
005 - Computer programming, programs & data
2
643 - Housing & household equipment
2
330 - Economics
1
338 - Production
1
384 - Communications; telecommunication
1
500 - Natural sciences & mathematics
1
620 - Engineering & allied operations
1
621 - Applied physics
1
681 - Precision instruments & other devices
1