ABSTRACT
We divide Old Korean (OK) into Early, Mid and Late Old Korean (EOK, MOK, LOK). EOK was the Korean of the Three Kingdoms period, roughly from the start of the fifth century until Silla unified the Three Kingdoms in the 660s. MOK was the Korean of the Unified Silla [Sinla] period, from the 660s until the 930s when Koryŏ [Kolye] re-unified the country. LOK was the language of the earlier part of the Koryŏ dynasty from the 930s till the mid-thirteenth century.
