.DIZ File Extension

Plain text file that describes the program or files within a .ZIP archive; typically named "FILE_ID.DIZ," where FILE_ID stands for "file identification" and DIZ stands for "Description in Zip File."

DIZ files were originally used for distributing files via BBS (bulletin board systems). The information contained in FILE_ID.DIZ files provided system administrators with helpful descriptions of each file that was uploaded to the system.