In this paper, some fundamental problems in the assignment and standardization of codes for Korean letters are discussed, and a multi-code method is proposed for the code assignment. This method is designed in particular to reflect the characteristics of Korean letters. Also, based on this method, a computer internal code and a telex code are suggested. The multi-code method enables us to obtain information on the display at a terminal rather easily by assigning the information dispersed among the code sequences to code himself and position. Further this method is shown to be capable of improving the transmission rate by 7.5% over the conventional resolution method if the given code space is efficiently utilized.