https://blog.gongquiz.com/2022/07/31/ms-dos-%eb%b6%80%ed%8c%85%ec%8b%9c-%ed%95%84%ec%9a%94%ed%95%9c-%ed%8c%8c%ec%9d%bc%ec%9d%98-%ec%9d%bd%eb%8a%94-%ec%88%9c%ec%84%9c%eb%a5%bc-%ec%98%b3%ea%b2%8c-%eb%82%98%ec%97%b4%ed%95%9c-%ea%b2%83/