The greatest academic achievement of the Institute of Language and Information Studies is the . It includes around 52,000 entries in 2,144 pages and was compilated based on the linguistic data from 1960s to mid-1990s. Countless researchers participated in the compilation project with the budget of more than 150,000,000 won in the span of 13 years. During this period, we have digitalized a large corpus for the first time in Korea to find the most appropriate example sentences for the dictionary and developed data processing skills and software to compile the dictionary. It represents a successful interdisciplinary achievement by combining the field of Korean Linguistics and Lexicography by providing linguistic descriptions of the individual words as well as their lexical definitions based on the close examination of actual usage patterns of the words in the corpus.