0	General works
1	Philosophy
2	Religion
3	Social Science
	355	Military Science
	370	Pedagogy
	390	Ethnography
5	Natural Science
	502	Environment protection
	510	Mathematics
	520	Astronomy
	530	Physics
	540	Chemistry
	550	Geology
	560	Paleontology
	570	Biology
	580	Botany
	590	Zoology

6	Applied Sciences
	608	 Inventions
	610	 Medicine
	620	 Technology
	633	 Plant cultivation
	636	 Stock-raising
	641	 Gastronomy, cookery
	689	 Handicrafts
7	Art, sport
	720	 Architecture
	780	 Music
	796	 Sport
8	Grammar, Literature
	809	 Hungarian grammar
	894	 Hungarian literature
9	Geography, biography, history
	908	 Knowledge of our country
	910	 Geography
	920	 Biographies
	930	 History
	943.9 The story of Hungary