Nowadays there are so many medical informations that otolaryngologists should know. Computer systems offer new opportunities for the storage and manipulation of hospital informations. A computer-based system for otolaryngologic patient data management has been designed and developed by the authors. This program was written in dBASE IV language and could be used in IBM PC AT(16 Bit) with at least 20MB hard disk drive. The main features of this program include easy storage and retrieval of data, using automatic coding system for diagnosis and operation names. Searching a case or grouped cases could be performed by name, chart number, and filters(date of input, diagnosis code, operation code, ENT number). And they are easily printed out by two different print forms. The automatic coding system is that the codes of diagnosis and operation names are automatically registered when the names are typed. The ENT code system for automatic coding was also made by the authors. We conclude that this computer-based ENT patient data management system by automatic coding is very useful, easy to handle, and minimizing input errors. But the code system we have made will be more discussed to use in many institutes.