• stoy
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    15 hours ago

    Take a .docx file, using 7-zip, exctract it.

    You will get an entire folder structure with several files inside the .docx file.

    What OP means is that several programs use a zip file as a container for all the stuff they need in a save file.

    The file extention is just a name for the OS to find the proper program to open the file.