: Use a tool like WinRAR or 7-Zip to extract the contents.
: Many Java-based OS projects, including various "Just an OS" iterations, are hosted on GitHub. You can often find the source code and compiled releases there. Download JaS rar
: Ensure you have the Java Runtime Environment (JRE) installed, then run the command: java -jar [filename].jar : Use a tool like WinRAR or 7-Zip to extract the contents