Oafr African studies
Oe Ethiopia
Oq Hamic languages
Oä Egyptology
Ob Assyriology
Oc Comparative Semitic linguistics
Os Syriac and Aramaic
Ou Ugarit
Oel Elamite
Oat Arabic texts
Oav Arabic varia: history, Islamic culture, literature and history
Oag Arabic grammar books, textbooks
Oad Arabic dictionaries (reference only)
Oht Hebraic texts
Ohv Hebrew varia: Judaism, history of literature, etc
Oi 1 Iranian: Old and Central Iranian languages
Oi 2 Iranian: New Iranian languages
Oi 3 Iranian: Pre-Islamic time (history/culture)
Oi 4 Iranian: Islamic time (history/culture)
Oi 5 Sanakirjat Dictionaries and reference books (reference only) Oka Caucasus
Ov Varia
Om 1 Comparative Altaic studies
Om 2 Peoples of Siberia and Central Asia
Om 3 Mongolian
Om 4 Buryat
Om 5 Daguor
Om 6 Monguor
Om 7 Moghol
Om 8 Oirat
Om 9 Kalmyk
Om 10 Comparative Mongolian and other Mongolian languages
Om 11 Manchu
Om 12 Jurchen
Om 13 Goldi (Nanai)
Om 14 Olcha
Om 15 Oroch
Om 16 Orok
Om 17 Udege
Om 18 Tungusic (Evenki)
Om 19 Lamut (Even)
Om 20 Solon
Om 21 Negidal
Om 22 Samagir
Om 23 Comparative Tungusic and other Tungusic languages
Om 24 Turkish (Contemporary Turkish, Ottoman Turkish)
Om 25 Gagauz
Om 26 Azerbaijani
Om 27 Turkmen
Om 28 Karachay-Balkar
Om 29 Kumyk
Om 30 Bashkir
Om 31 Tatar (Volga Tatar)
Om 32 Nogai
Om 33 Kazakh and Karakalpak
Om 34 Kyrgyz
Om 35 Central Turkish languages
Om 37 Uzbek
Om 38 Modern Uyghur (Eastern Turki, Taranchi)
Om 39 Old Turkish
Om 40 Tuva, tofa
Om 41 Yakut
Om 42 Khakas
Om 43 Altai (Oirot)
Om 44 Bulgar (Volga and Danubian Bulgar)
Om 45 Chuvash
Om 46 Karaim
Om 47 Comparative Turkology and other Turkish languages
Om 48 North-eastern Siberians, Eskimos, American Indians
Om 53 Tibetan, Tangut
Om 54 South-East Asia, Oceania and Australian
Om 500 Korean reference books (reference only)
Om 501 Korean dictionaries (reference only)
Om 502 Korean textbooks
Om 503 Korean philology
Om 504 Korean literature
Om 505 Korean literary research
Om 506 Korean history
Om 507 Korean cultural history and art
Om 508 Korean religion and philosophy
Om 509 Korean society
Om 510 Japanese reference books (reference only)
Om 511 Japanese dictionaries (reference only)
Om 512 Japanolese textbooks
Om 513 Japanese philology
Om 514 Japanese literature
Om 515 Japanese literary research
Om 516 Japanese history
Om 517 Japanese cultural history and art
Om 518 Japanese religion and philosophy
Om 519 Japanese society
Om 520 Chinese reference books (reference only)
Om 521 Chinese dictionaries (reference only)
Om 522 Chinese textbooks
Om 523 Chinese philology
Om 525 Chinese literary research
Om 526 Chinese history
Om 527 Chinese cultural history and art
Om 528 Chinese religion and philosophy
Om 529 Chinese society
Om 55 Asia, general
O> Varia: large books
Oi> Iranian: large books
Om> East and Central Asia: large books
Oä> Egyptology: large books
Oys> South Asia: large books
OYs 1 Indian philology: reference books
OYs 2 Veda literature
OYs 3 Hindu literature
OYs 4 Buddhist literature
OYs 5 Jainism literature
OYs 8 Indian literary history
OYs 9 Indian history, culture, religions and philosophy
OYs 10 Sanskrit linguistics
OYs 11 Middle Indo-Aryan languages
OYs 12 Bengali
OYs 13 Hindi and Urdu
OYs 15 Other Indo-Aryan languages
OYs 16 Dravidian languages
OYs 17 Munda languages, Andamanese languages, Burushaski
OYs 19 Comparative Indo-European linguistics
OYs 20 Hittite
OYs 21 Tocharian
Obi Bibliographies
Oa Arabic languages, Islam
Oafr Africa Oh Hebrew language, Judaism
Oi Iranian studies
Om Central Asia, Turkology
Om 50 Korea
Om 51 Japan
Om 52 China
OYs South Asian studies
Oä Egyptology