Classification
374 - Adult education
35
004 - Data processing & computer science
20
331 - Labor economics
13
005 - Computer programming, programs & data
9
384 - Communications; telecommunication
7
621 - Applied physics
6
500 - Natural sciences & mathematics
3
000 - Computer science, information & general works
1
620 - Engineering & allied operations
1
929 - Genealogy, names & insignia
1