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Looks like MS-DOS 5's Dos Shell https://geekfolk.blogspot.com/2016/02/remembering-dos-shell.html https://geekfolk.blogspot.com/2016/02/remembering-dos-shell...

Looks like MS-DOS 5's Dos Shell https://geekfolk.blogspot.com/2016/02/remembering-dos-shell.html https://geekfolk.blogspot.com/2016/02/remembering-dos-shell....