Classification
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333 - Economics of land & energy
5
510 - Mathematics
5
140 - Specific philosophical schools
4
303 - Social processes
4
304 - Factors affecting social behavior
4
372 - Elementary education
4
378 - Higher education
4
499 - Austronesian & other languages
4
612 - Human physiology
4
621 - Applied physics
4
126 - The self
3
146 - Naturalism & related systems
3
380 - Commerce, communications & transportation
3
500 - Natural sciences & mathematics
3
511 - General principles of mathematics
3
570 - Life sciences; biology
3
880 - Hellenic literatures; classical Greek
3
003 - Systems
2
155 - Differential & developmental psychology
2
180 - Ancient, medieval & eastern philosophy
2
184 - Platonic philosophy
2
193 - Philosophy of Germany & Austria
2
220 - Bible
2
341 - Law of nations
2
342 - Constitutional & administrative law
2
363 - Other social problems & services
2
409 - Geographic & persons treatment
2
411 - Writing systems
2
412 - Etymology
2
491 - East Indo-European & Celtic languages
2
509 - Historical, geographic & persons treatment
2
520 - Astronomy & allied sciences
2
539 - Modern physics
2
618 - Gynecology, obstetrics, pediatrics & geriatrics
2
620 - Engineering & allied operations
2
624 - Civil engineering
2
780 - Music
2
930 - History of ancient world to ca. 499
2
940 - History of Europe
2
030 - General encyclopedic works
1
070 - News media, journalism & publishing
1
144 - Humanism & related systems
1
177 - Ethics of social relations
1
179 - Other ethical norms
1
189 - Medieval western philosophy
1
199 - Philosophy in other geographic areas
1
210 - Philosophy & theory of religion
1
211 - Concepts of God
1
230 - Christianity & Christian theology
1
261 - Social theology
1
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